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Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Current: |  |  |
Federal | $ 180,895 | $ 148,221 | $ 137,675
State | 36,142 | 28,881 | 30,352
Deferred: |  |  |
Federal | 2,681 | (4,451) | (13,402)
State | 567 | (735) | (2,406)
Total | $ 220,285 | $ 171,916 | $ 152,219

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