Annual report pursuant to Section 13 and 15(d)

Segment Information (Details)

v2.4.0.6
Segment Information (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Segment Reporting Information [Line Items]      
Number of reportable segments 2 2 2
Premium and service revenues from external customers $ 5,181,007 $ 4,283,833 $ 3,878,283
Premium and service revenues 5,181,007 4,283,833 3,878,283
Earnings from operations 190,324 157,069 138,135
Total assets 2,190,336 1,943,882 1,702,364
Stock compensation expense 18,171 13,874 14,634
Depreciation expense 42,249 37,131 33,103
Medicaid Managed Care [Member]
     
Segment Reporting Information [Line Items]      
Premium and service revenues from external customers 4,450,336 3,679,807 3,398,009
Premium and service revenues from internal customers 65,215 60,676 66,763
Premium and service revenues 4,515,551 3,740,483 3,464,772
Earnings from operations 152,995 117,106 99,307
Total assets 1,754,108 1,552,886 1,330,987
Specialty Services [Member]
     
Segment Reporting Information [Line Items]      
Premium and service revenues from external customers 730,671 604,026 480,274
Premium and service revenues from internal customers 753,596 508,157 569,191
Premium and service revenues 1,484,267 1,112,183 1,049,465
Earnings from operations 37,329 39,963 38,828
Total assets 436,228 390,996 371,377
Eliminations [Member]
     
Segment Reporting Information [Line Items]      
Premium and service revenues from internal customers (818,811) (568,833) (635,954)
Premium and service revenues $ (818,811) $ (568,833) $ (635,954)