Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of Provision (Benefit) for Income Taxes (Detail)

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Income Taxes - Summary of Provision (Benefit) for Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Current expense:      
Federal $ 14,755 $ 21,037 $ 12,711
State 5,084 5,753 463
Total current expense 19,839 26,790 13,174
Deferred expense (benefit):      
Federal 13,663 (3,597) 8,197
State 4,680 (333) 1,403
Total deferred expense 18,343 (3,930) 9,600
Provision for income taxes $ 38,182 $ 22,860 $ 22,774