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Income Taxes - Components of Income Tax Provision (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Current:      
Federal $ 50,645 $ 61,830 $ 47,245
State and local 8,105 7,402 7,877
Total current expense (benefit) 58,750 69,232 55,122
Deferred:      
Federal 4,106 (775) (152)
State and local 617 82 (354)
Total deferred expense (benefit) 4,723 (693) (506)
Income tax expense $ 63,473 $ 68,539 $ 54,616