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Short-Term And Long-Term Investments And Restricted Deposits (Tables)
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12 Months Ended |
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Dec. 31, 2012
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| Investments, Debt and Equity Securities [Abstract] |
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| Short-Term And Long-Term Investments And Restricted Deposits By Investment Type |
Short-term and long-term investments and restricted deposits by investment type consist of the following:
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December 31, 2012 |
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December 31, 2011 |
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Amortized
Cost
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Gross
Unrealized
Gains
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Gross
Unrealized Losses
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Fair
Value
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Amortized
Cost
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Gross
Unrealized
Gains
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Gross
Unrealized Losses
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Fair
Value
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U.S. Treasury securities and obligations of U.S. government corporations and agencies |
$ |
117,434 |
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$ |
594 |
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$ |
(221 |
) |
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$ |
117,807 |
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$ |
29,014 |
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$ |
638 |
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$ |
(13 |
) |
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$ |
29,639 |
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Corporate securities |
315,807 |
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5,101 |
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(198 |
) |
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320,710 |
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186,018 |
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3,762 |
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(751 |
) |
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189,029 |
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Restricted certificates of deposit |
5,890 |
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— |
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— |
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5,890 |
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5,890 |
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— |
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— |
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5,890 |
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Restricted cash equivalents |
14,460 |
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— |
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— |
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14,460 |
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13,775 |
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— |
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— |
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13,775 |
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Municipal securities: |
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General obligation |
88,690 |
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1,173 |
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(26 |
) |
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89,837 |
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126,806 |
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2,828 |
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(26 |
) |
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129,608 |
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Pre-refunded |
5,337 |
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|
85 |
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— |
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5,422 |
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33,247 |
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|
465 |
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— |
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33,712 |
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Revenue |
84,726 |
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|
1,331 |
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(30 |
) |
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86,027 |
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118,507 |
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2,387 |
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(34 |
) |
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120,860 |
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Variable rate demand notes |
37,685 |
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— |
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— |
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37,685 |
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64,658 |
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— |
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— |
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64,658 |
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Asset backed securities |
83,295 |
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1,197 |
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(17 |
) |
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84,475 |
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51,779 |
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430 |
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(17 |
) |
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52,192 |
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Cost and equity method investments |
11,298 |
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— |
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— |
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11,298 |
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9,395 |
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— |
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— |
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9,395 |
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Life insurance contracts |
15,023 |
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— |
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— |
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15,023 |
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14,699 |
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— |
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— |
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14,699 |
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Total |
$ |
779,645 |
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$ |
9,481 |
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$ |
(492 |
) |
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$ |
788,634 |
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$ |
653,788 |
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$ |
10,510 |
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$ |
(841 |
) |
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$ |
663,457 |
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| Schedule Of Available-For-Sale Investments In A Continuous Unrealized Loss Position |
The fair value of available-for-sale investments with gross unrealized losses by investment type and length of time that individual securities have been in a continuous unrealized loss position were as follows:
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December 31, 2012 |
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December 31, 2011 |
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Less Than 12 Months |
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12 Months or More |
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Less Than 12 Months |
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12 Months or More |
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Unrealized Losses |
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Fair
Value
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Unrealized Losses |
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Fair
Value
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Unrealized Losses |
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Fair
Value
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Unrealized Losses |
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Fair
Value
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U.S. Treasury securities and obligations of U.S. government corporations and agencies |
$ |
(219 |
) |
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$ |
56,033 |
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$ |
(2 |
) |
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$ |
202 |
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$ |
(13 |
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$ |
2,184 |
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$ |
— |
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$ |
— |
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Corporate securities |
(198 |
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44,758 |
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— |
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— |
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(751 |
) |
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23,040 |
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— |
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— |
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Municipal securities: |
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General obligation |
(26 |
) |
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8,464 |
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— |
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— |
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(26 |
) |
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3,710 |
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— |
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— |
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Revenue |
(30 |
) |
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3,325 |
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— |
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— |
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(34 |
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12,597 |
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— |
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— |
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Asset backed securities |
(17 |
) |
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9,321 |
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— |
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— |
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(17 |
) |
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20,417 |
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— |
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— |
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Total |
$ |
(490 |
) |
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$ |
121,901 |
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$ |
(2 |
) |
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$ |
202 |
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$ |
(841 |
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$ |
61,948 |
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$ |
— |
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$ |
— |
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| Contractual Maturities Of Short-Term And Long-Term Investments And Restricted Deposits |
The contractual maturities of short-term and long-term investments and restricted deposits are as follows:
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December 31, 2012 |
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December 31, 2011 |
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Investments |
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Restricted Deposits |
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Investments |
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Restricted Deposits |
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Amortized
Cost
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Fair
Value
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Amortized
Cost
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Fair
Value
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Amortized
Cost
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Fair
Value
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Amortized
Cost
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Fair
Value
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One year or less |
$ |
138,011 |
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$ |
139,118 |
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$ |
34,403 |
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$ |
34,435 |
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$ |
129,232 |
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$ |
130,499 |
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$ |
19,666 |
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$ |
19,666 |
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One year through five years |
474,068 |
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481,381 |
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358 |
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358 |
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406,140 |
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413,953 |
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7,085 |
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7,152 |
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Five years through ten years |
94,006 |
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93,878 |
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— |
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— |
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34,945 |
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34,961 |
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— |
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— |
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Greater than ten years |
38,799 |
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39,464 |
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— |
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— |
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56,720 |
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57,226 |
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— |
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— |
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Total |
$ |
744,884 |
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$ |
753,841 |
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$ |
34,761 |
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$ |
34,793 |
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$ |
627,037 |
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$ |
636,639 |
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$ |
26,751 |
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$ |
26,818 |
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| Gross Recorded Realized Gains And Losses On Investments |
The Company’s gross recorded realized gains and losses were as follows:
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Year Ended December 31, |
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2012 |
|
2011 |
|
2010 |
Gains |
$ |
1,509 |
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$ |
314 |
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$ |
6,036 |
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Losses |
(25 |
) |
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(27 |
) |
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(270 |
) |
Impairment of investment |
— |
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— |
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(5,531 |
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Net realized gains |
$ |
1,484 |
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$ |
287 |
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$ |
235 |
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