Compensation Plans - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Payment Arrangement [Abstract]
Other comprehensive income (loss), securities, available-for-sale, unrealized holding gain (loss) arising during period, before tax	$ 31,798	$ 38,764	$ (6,143)
Other comprehensive income (loss), securities, available-for-sale, unrealized holding gain (loss) arising during period, tax	7,854	9,575	(1,517)
Other comprehensive income (loss), securities, available-for-sale, unrealized holding gain (loss) arising during period, net of tax	23,944	29,189	(4,626)
Reclassification adjustment for realized gains on sale of securities available for sale included in net income, before tax	(421)	49	(9)
Reclassification adjustment for realized gains on sale of securities available for sale included in net income, tax	(104)	12	(2)
Reclassification adjustment for realized gains on sale of securities available for sale included in net income, net of tax	(317)	37	(7)
Other Comprehensive Income (Loss), Reclassification of (gain) loss on held to maturity securities, before of tax	(2,537)	(44)	4
Other Comprehensive Income (Loss), Reclassification of (gain) loss on held to maturity securities, tax	(627)	(11)	1
Other Comprehensive Income (Loss), Reclassification of (gain) loss on held to maturity securities, net of tax	(1,910)	(33)	3
Other comprehensive income (loss), unrealized gain (loss) on derivatives arising during period, before tax	(7,898)	(3,004)	0
Other comprehensive income (loss), unrealized gain (loss) on derivatives arising during period, tax	(1,951)	(742)	0
Other comprehensive income (loss), unrealized gain (loss) on derivatives arising during period, net of tax	(5,947)	(2,262)	0
Other comprehensive income (loss), reclassification adjustment from AOCI on derivatives, before tax	4,782	133	0
Other comprehensive income (loss), reclassification adjustment from AOCI on derivatives, tax	1,181	33	0
Other comprehensive income (loss), reclassification adjustment from AOCI on derivatives, net of tax	3,601	100	0
Other comprehensive income (loss) before tax	25,724	35,898	(6,148)
Other comprehensive income (loss) tax	6,353	8,867	(1,518)
Other comprehensive income (loss), net	$ 19,371	$ 27,031	$ (4,630)