Annual report pursuant to Section 13 and 15(d)

Comprehensive Income (Loss) (Schedule Of Comprehensive Income (Loss)) (Details)

v2.4.0.6
Comprehensive Income (Loss) (Schedule Of Comprehensive Income (Loss)) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Comprehensive Income (Loss) [Abstract]                      
Net income (loss) $ 46,065 $ 52,928 $ 55,175 $ 18,649 $ 20,519 $ 27,188 $ 27,870 $ 42,315 $ 172,817 $ 117,892 $ (187,919)
Amounts reclassified to income, net of income tax of $0 in 2011, $0 in 2010 and $346 in 2009                     643 [1]
Comprehensive income (loss)                 172,817 117,892 (187,276)
Other comprehensive income of interest rate swap of cash flow hedge, tax                 $ 0 $ 0 $ 346
[1] Includes the amortization of amounts recorded in other comprehensive income upon the de-designation of our interest rate swap as a cash flow hedge in 2007.