Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income available to common shareholders	$ 22,732	$ 20,126	$ 64,694	$ 67,374
Available-for-Sale Securities
Unrealized (losses) gains on available-for-sale securities arising during the period	(9,666)	(703)	(20,752)	30,662
Reclassification adjustment for gains	0	0	(312)	(56)
Reclassification of unrealized gains on held-to-maturity securities to available-for-sale	0	0	0	1,562
Other comprehensive (loss) income before income taxes	(9,666)	(703)	(21,064)	32,168
Tax effect	2,317	164	5,048	(7,518)
Other comprehensive (loss) income, net of tax	(7,349)	(539)	(16,016)	24,650
Comprehensive Income, Net of Tax	$ 15,383	$ 19,587	$ 48,678	$ 92,024