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Income Taxes Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Current: |  |  |  |  |  |  |  |  |  |  |
State |  |  |  |  |  |  |  |  | $ (1,069) | $ 14,384 | $ 6,860
Federal |  |  |  |  |  |  |  |  | (439) | 16,039 | 6,325
Deferred: |  |  |  |  |  |  |  |  |  |  |
State |  |  |  |  |  |  |  |  | (14,218) | 4,314 | 7,385
Federal |  |  |  |  |  |  |  |  | (240,275) | 118,604 | 77,566
Total income tax (benefit) expense provision | $ (36,663) | $ (216,603) | $ (17,214) | $ 14,479 | $ 67,757 | $ 4,876 | $ 31,461 | $ 49,247 | $ (256,001) | $ 153,341 | $ 98,136

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