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Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Current:                      
Federal                 $ 58,507 $ 10,621 $ 13,894
State                 14,691 (759) (195)
Foreign                 15,545 2,968 1,079
Current Income Tax Expense (Benefit)                 88,743 12,830 14,778
Deferred:                      
Federal                 (53,711) 62,704 29,440
State                 (4,325) (431) 368
Foreign                 (5,397) 1,482 86
Provision for valuation allowance on deferred tax assets                 15,764 0 0
Deferred Income Tax Expense (Benefit)                 (47,669) 63,755 29,894
Total $ 14,824 $ 9,273 $ 10,789 $ 6,188 $ 11,138 $ 29,346 $ 25,331 $ 10,770 $ 41,074 $ 76,585 $ 44,672