CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 43,963	$ 46,855
OTHER COMPREHENSIVE LOSS, NET OF INCOME TAXES:
Unrealized holding loss on securities—available-for-sale arising during the period	(153,064)	(73,107)
Income tax benefit related to securities—available-for-sale unrealized holding losses	36,736	17,546
Reclassification for net gain on securities—available-for-sale realized in earnings	(435)	(439)
Income tax expense related to securities—available-for-sale realized gains	104	105
Unrealized loss on securities transferred from available-for-sale to held-to-maturity	(34,272)	0
Income tax benefit related to securities transferred from available-for-sale to held-to-maturity	8,226	0
Net unrealized loss on interest rate swaps used in cash flow hedges	(14,775)	0
Income tax benefit related interest rate swaps used in cash flow hedges	3,546	0
Changes in fair value of junior subordinated debentures related to instrument specific credit risk	(1,213)	(274)
Income tax benefit related to junior subordinated debentures	291	66
Reclassification of fair value of junior subordinated debentures redeemed	765	0
Income tax expense related to junior subordinated debentures redeemed	(184)	0
Other comprehensive loss	(154,275)	(56,103)
COMPREHENSIVE LOSS	$ (110,312)	$ (9,248)