CONSOLIDATED CONDENSED 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	$ 52,770	$ 36,210	$ 157,798	$ 103,465
Unrealized gains/losses on securities available-for-sale:
Unrealized holding gain (loss) arising during the period	(24,048)	3,568	(39,721)	57,885
Reclassification adjustment for losses (gains) included in net income	(1,756)	(1,817)	(5,316)	(9,497)
Tax effect	5,419	(367)	9,458	(10,162)
Net of tax	(20,385)	1,384	(35,579)	38,226
Unrealized gain/loss on cash flow hedges:
Unrealized holding gain (loss) arising during the period	(20)	8	22	(1,451)
Reclassification adjustment for losses (gains) included in net income	266	294	779	651
Tax effect	(52)	(63)	(169)	168
Net of tax	194	239	632	(632)
Total other comprehensive income (loss), net of tax	(20,191)	1,623	(34,947)	37,594
Comprehensive income	$ 32,579	$ 37,833	$ 122,851	$ 141,059