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Income Taxes - Components of Income Tax Provision (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Current tax provision      
Federal $ 9,710 $ 7,097 $ 8,523
State 3,794 2,931 3,195
Total current 13,504 10,028 11,718
Deferred tax provision (benefit)      
Federal (206) 382 (146)
State 48 80 126
Total deferred (158) 462 (20)
Total income tax provision $ 13,346 $ 10,490 $ 11,698