Parent Corporation Only Financial Statements (Details) - Condensed Statements of Income - 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
Income:
Dividend income from subsidiaries									$ 1,642	$ 1,778	$ 2,012
Net Income	$ 25,641	$ 24,786	$ 14,832	$ 6,030	$ 20,783	$ 21,696	$ 19,281	$ 11,635	71,289	73,395	60,352
Parent Company [Member]
Income:
Dividend income from subsidiaries									15,200	30,050	16,700
Other income									1,683	1,652	1,618
Total Income									16,883	31,702	18,318
Expenses									(9,263)	(7,386)	(7,201)
Income before equity in undistributed earnings of subsidiaries									7,620	24,316	11,117
Equity in undistributed earnings of subsidiaries									63,669	49,079	49,235
Net Income									$ 71,289	$ 73,395	$ 60,352