Quarterly Condensed Financial Information (Unaudited) (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
Quarterly Condensed Financial Information (Unaudited)
Interest income	$ 22,887	$ 23,625	$ 23,478	$ 23,310	$ 23,231	$ 22,197	$ 21,816	$ 20,458	$ 93,300	$ 87,702	$ 75,637
Interest expense	4,428	4,944	5,187	4,190	3,978	3,268	2,916	2,316	18,749	12,478	7,967
Net interest income	18,459	18,681	18,291	19,120	19,253	18,929	18,900	18,142	74,551	75,224	67,670
Provision for loan losses	1,797	1,498	1,797	2,220	1,530	1,530	4,020	1,530	7,312	8,610	3,280
Net interest income after provision for loan losses	16,662	17,183	16,494	16,900	17,723	17,399	14,880	16,612	67,239	66,614	64,390
Noninterest income	29,556	29,580	29,984	25,074	26,141	26,258	26,094	24,256	114,194	102,749	103,045
Noninterest Expense	36,435	37,327	35,261	33,514	35,911	34,336	33,808	32,270	142,537	136,325	134,920
Income before income taxes	9,783	9,436	11,217	8,460	7,953	9,321	7,166	8,598	38,896	33,038	32,515
Income tax expense	2,131	2,332	2,869	2,024	1,920	1,951	1,567	1,734	9,356	7,172	17,514
Net income	$ 7,652	$ 7,104	$ 8,348	$ 6,436	$ 6,033	$ 7,370	$ 5,599	$ 6,864	$ 29,540	$ 25,866	$ 15,001
Basic earnings per common share	$ 0.44	$ 0.49	$ 0.60	$ 0.47	$ 0.44	$ 0.53	$ 0.41	$ 0.50	$ 1.96	$ 1.88	$ 1.10
Diluted earnings per common share	$ 0.43	$ 0.48	$ 0.59	$ 0.46	$ 0.43	$ 0.52	$ 0.40	$ 0.49	$ 1.91	$ 1.84	$ 1.07