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Provision for Income Taxes - Provision for Income Taxes (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Income Tax Disclosure [Abstract]    
Expected tax expense, at the U.S. federal statutory income tax rate of 35% $ 1,701 $ 1,185
Domestic production activities deduction (145) (105)
State income taxes 132 98
Other, net 20 7
Total income tax expense $ 1,708 $ 1,185