Earnings Per Share ("EPS") - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net income as reported	$ 10,675	$ 8,012	$ 10,142	$ 10,380	$ 9,490	$ 8,331	$ 9,437	$ 8,847	$ 39,209	$ 36,105	$ 25,528
Less: Earnings allocated to Participating Securities									$ (74)
Shares outstanding									20,030,866	20,000,022	15,908,893
Impact of weighting shares									(13,560)	(2,848,800)	(1,830,612)
Used in basic EPS, Income									$ 39,135	$ 36,105	$ 25,528
Used in basic EPS, Shares									20,017,306	17,151,222	14,078,281
Dilutive effect of outstanding
Stock options, Shares									376,118	816,431	1,160,084
Used in dilutive EPS, Income									$ 39,135	$ 36,105	$ 25,528
Used in dilutive EPS, Shares									20,393,424	17,967,653	15,238,365
Basic earnings per common share	$ 0.53	$ 0.40	$ 0.51	$ 0.52	$ 0.48	$ 0.50	$ 0.58	$ 0.55	$ 1.96	$ 2.11	$ 1.81
Diluted earnings per common share	$ 0.52	$ 0.39	$ 0.50	$ 0.51	$ 0.47	$ 0.48	$ 0.54	$ 0.52	$ 1.92	$ 2.01	$ 1.68