Condensed Financial Information (Parent Company Only) - Condensed Statements of Comprehensive Income (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
Condensed Comprehensive Income [Line Items]
Net Income	$ 21,893	$ 20,312	$ 14,639	$ 11,655	$ 18,543	$ 20,537	$ 16,642	$ 10,816	$ 68,499	$ 66,538	$ 53,117
Other Comprehensive Income (Loss)
Changes from derivative instruments									(3,004)	(2,117)	(25)
Other Comprehensive Income (Loss), Net of Tax					$ (3,827)				21,420	14,576	(3,827)
Comprehensive Income									89,919	81,114	49,290
Parent Company
Condensed Comprehensive Income [Line Items]
Net Income									68,499	66,538	53,117
Other Comprehensive Income (Loss)
Changes from derivative instruments									(3,004)	(2,117)	(25)
Unrealized appreciation for the period on held to maturity securities, net of taxes									(46)	(92)	(150)
Unrealized appreciation (depreciation) on available for sale securities, net of taxes									27,865	16,726	(4,003)
Less: reclassification adjustment for realized (gains) losses included in net income, net of taxes									(3,395)	59	351
Other Comprehensive Income (Loss), Net of Tax									21,420	14,576	(3,827)
Comprehensive Income									$ 89,919	$ 81,114	$ 49,290