v3.19.1
Nature of Business and Basis of Presentation - Earnings per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Basic EPS                    
Net income                 $ 12,767 $ 7,109
Weighted average number of shares outstanding, basic (in shares)                 12,116,459 11,261,132
Basic earnings per share (in dollars per share) $ 0.26 $ 0.27 $ 0.26 $ 0.26 $ (0.06) $ 0.27 $ 0.26 $ 0.17 $ 1.05 $ 0.63
Effect of dilutive securities (in shares)                 345,679 166,868
Weighted average number of shares outstanding, diluted (in shares)                 12,462,138 11,428,000
Diluted earnings per share (in dollars per share) $ 0.25 $ 0.26 $ 0.26 $ 0.25 $ (0.06) $ 0.27 $ 0.25 $ 0.17 $ 1.02 $ 0.62
Stock Options                    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                    
Antidilutive securities excluded from computation of earnings per share (in shares)                 7,000 246,500