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Income Taxes - Components of Income Tax Provision (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Current tax provision      
Federal $ 7,097 $ 8,523 $ 6,717
State 2,931 3,195 2,574
Total current 10,028 11,718 9,291
Deferred tax provision (benefit)      
Federal 382 (146) (873)
State 80 126 (479)
Total deferred 462 (20) (1,352)
Total income tax provision $ 10,490 $ 11,698 $ 7,939