Parent-only Financial Statements, Condensed Statements of Cash Flows (Details) - USD ($) $ 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
Operating Activities [Abstract]
Net income	$ 4,739	$ 4,440	$ 5,036	$ 5,051	$ 4,502	$ (6,519)	$ 5,126	$ 5,116	$ 19,266	$ 8,225	$ 25,000
Items not requiring (providing) cash [Abstract]
Stock-based compensation expense									771	12,116	154
Changes in [Abstract]
Net cash provided by operating activities									25,235	19,180	27,001
Financing Activities [Abstract]
Repayment of borrowed funds									0	0	(5,600)
Common stock acquired and canceled									(9,076)	(2,646)	0
Dividends paid									(7,803)	(1,006)	(56,155)
Net cash provided by (used in) financing activities									131,152	77,928	38,608
Increase in Cash and Due from Banks									36,773	(10,962)	28,036
Cash and Due from Banks, Beginning of Period				117,128				128,090	117,128	128,090	100,054
Cash and Due from Banks, End of Period	153,901				117,128				153,901	117,128	128,090
Supplemental Disclosure of Cash Flows Information [Abstract]
Interest paid									6,502	9,342	7,304
Dividends declared and not paid	994				5,029				994	5,029	0
Parent Company [Member]
Operating Activities [Abstract]
Net income									19,266	8,225	25,000
Items not requiring (providing) cash [Abstract]
Equity in undistributed net income									(6,420)	(2,040)	(13,521)
Dividends receivable from subsidiary bank									(995)	(5,029)	0
Stock-based compensation expense									0	0	154
Changes in [Abstract]
Accounts payable and accrued expenses									0	(149)	0
Other current assets and liabilities									5,034	0	199
Net cash provided by operating activities									16,885	1,007	11,832
Financing Activities [Abstract]
Repayment of borrowed funds									0	0	(5,600)
Common stock acquired and canceled									(9,076)	0	50,154
Dividends paid									(7,803)	(1,006)	(56,155)
Net cash provided by (used in) financing activities									(16,879)	(1,006)	(11,601)
Increase in Cash and Due from Banks									6	1	231
Cash and Due from Banks, Beginning of Period				$ 296				$ 295	296	295	64
Cash and Due from Banks, End of Period	302				296				302	296	295
Supplemental Disclosure of Cash Flows Information [Abstract]
Interest paid									0	0	175
Dividends declared and not paid	$ 995				$ 5,029				$ 995	$ 5,029	$ 0