Quarterly report pursuant to Section 13 or 15(d)

Debt (Narrative) (Details)

v2.3.0.15
Debt (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
1 Months Ended 9 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended
Jan. 31, 2011
Sep. 30, 2011
Dec. 31, 2010
Jan. 31, 2011
Maximum [Member]
Jan. 31, 2011
Minimum [Member]
Dec. 31, 2010
7.25% Senior Notes [Member]
May 31, 2011
5.75% Senior Notes [Member]
Senior notes, at par   $ 250,000 $ 175,000     $ 175,000 $ 250,000
Unamortized discount on senior notes   2,944          
Interest rate swap fair value   10,489          
Senior notes, percentage           7.25% 5.75%
Senior notes, discount percentage             6.00%
Senior notes due date Apr. 01, 2014 Jun. 01, 2017
Percentage of debt premium           103.625%  
Debt extinguishment costs   8,488          
Maximum borrowing capacity under previous revolving credit agreement 300,000            
New revolving credit agreement 350,000            
Revolving credit agreement maturity period, years 5            
Commitment fee percentage       0.50% 0.25%    
Borrowings outstanding   0          
Remaining borrowing capacity   350,000          
Letters of credit outstanding amount   $ 36,708          
Interest rate of outstanding letters of credit   1.66%