Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net income	$ 18,892	$ 20,460	$ 17,804	$ 21,853	$ 17,273	$ 14,290	$ 13,391	$ 8,757	$ 79,009	$ 53,711	$ 42,329
Basic weighted average shares (in shares)									52,168,679	52,079,865	52,284,616
Effect of dilutive stock options and restricted stock									892,490	555,550	383,323
Diluted weighted average shares									53,061,169	52,635,415	52,667,939
Basic (usd per share)	$ 0.36	$ 0.39	$ 0.34	$ 0.42	$ 0.33	$ 0.27	$ 0.26	$ 0.17	$ 1.51	$ 1.03	$ 0.81
Diluted (usd per share)	$ 0.35	$ 0.38	$ 0.34	$ 0.41	$ 0.33	$ 0.26	$ 0.26	$ 0.17	$ 1.49	$ 1.02	$ 0.80
Anti-dilutive shares (in shares)									364,787	1,868,087	1,920,313