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Income Taxes (Reconciliation of Provision for Income Taxes) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Reconciliation of Provision for Income Taxes |  |  |
Federal income expense at statutory tax rate | $ 25,844 | $ 65,603 | $ 48,865
State income taxes, net of federal tax benefit | 1,250 | 10,367 | 6,236
Officers' compensation | 2,900 | 3,657 | 1,732
Domestic Production Activities Deduction | (1,499) | (5,170) | (3,641)
Impact of state tax rate changes on deferreds | 2,435 | 3,245 |
Other | (2,383) | 1,800 | (873)
Total provision | $ 28,547 | $ 79,502 | $ 52,319
Reconciliation of Effective Income Tax Rate |  |  |
Federal income expense at statutory tax rate (in hundredths) | 35.00% | 35.00% | 35.00%
State income taxes, net of federal tax benefit (in hundredths) | 1.70% | 5.50% | 4.50%
Officers' compensation (in hundredths) | 3.90% | 2.00% | 1.20%
Domestic Production Activities Deduction (in hundredths) | (2.00%) | (2.80%) | (2.60%)
Impact of state tax rate changes on deferreds (in hundredths) | 3.30% | 1.70% |
Other (in hundredths) | (3.20%) | 1.00% | (0.60%)
Total (benefit) provision (in hundredths) | 38.70% | 42.40% | 37.50%

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