Parent Only Condensed Financial Statements - Condensed Statements of Income and Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income:
Dividends declared by Subsidiary - eliminated in consolidation	$ 15,622	$ 20,100	$ 2,850
Expenses:
Interest on junior subordinated deferrable interest debentures	130	210	199
Professional fees	2,398	1,305	1,475
Income before provision for income taxes	27,261	29,952	27,909
Benefit from income taxes	(6,914)	(8,509)	(6,620)
Income available to common shareholders	20,347	21,443	21,289
Comprehensive income	32,386	28,667	13,912
Parent Company
Income:
Dividends declared by Subsidiary - eliminated in consolidation	15,622	20,100	2,850
Other income	4	6	6
Total income	15,626	20,106	2,856
Expenses:
Interest on junior subordinated deferrable interest debentures	130	210	199
Professional fees	283	209	217
Other expenses	555	437	548
Total expenses	968	856	964
Income before provision for income taxes	14,658	19,250	1,892
Equity in undistributed net income of Subsidiary	5,328	1,932	19,075
Income before provision for income taxes	19,986	21,182	20,967
Benefit from income taxes	361	261	322
Income available to common shareholders	20,347	21,443	21,289
Comprehensive income	$ 32,386	$ 28,667	$ 13,912