Condensed Financial Information (Parent Company Only) - Condensed Statements of Income (Details) - USD ($) $ 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
Expenses
Interest on borrowings									$ 15,134	$ 10,716	$ 6,740
Salaries and employee benefits									27,014	23,174	21,164
Consulting and professional fees									3,669	3,055	3,091
Premises and equipment									6,059	4,996	4,183
Income tax benefit	$ 602	$ 449	$ 340	$ 526	$ (334)	$ 743	$ 781	$ 862	1,917	2,052	7,702
Net income	$ 7,096	$ 6,326	$ 6,121	$ 5,696	$ 3,576	$ 6,288	$ 6,008	$ 6,028	25,239	21,900	15,226
Parent Company
Expenses
Interest on borrowings									3,804	2,616	2,724
Salaries and employee benefits									804	564	354
Consulting and professional fees									1,610	958	664
Premises and equipment									285	285	302
Other									408	315	258
Total expenses									6,911	4,738	4,302
Loss before income tax and equity in undistributed net income of subsidiaries									(6,911)	(4,738)	(4,302)
Income tax benefit									(1,783)	(1,172)	(1,539)
Loss before equity in undistributed net income of subsidiaries									(5,128)	(3,566)	(2,763)
Equity in undistributed net income of subsidiaries									30,367	25,466	17,989
Net income									$ 25,239	$ 21,900	$ 15,226