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Income Taxes (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Current:                      
Federal                 $ 3,578 $ 3,619 $ 1,105
State                 489 496 137
Total current                 4,067 4,115 1,242
Deferred:                      
Federal                 (267) 391 2,353
State                 (50) 74 447
Total deferred                 (317) 465 2,800
Total income tax expense $ 1,052 $ 1,003 $ 730 $ 965 $ 1,083 $ 1,377 $ 1,001 $ 1,119 $ 3,750 $ 4,580 $ 4,042