CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - 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	$ 49,884	$ 36,548	$ 151,121	$ 76,971
OTHER COMPREHENSIVE INCOME, NET OF INCOME TAXES:
Unrealized holding (loss) gain on available-for-sale securities arising during the period	(23,223)	(3,090)	(62,711)	47,000
Income tax benefit (expense) related to available-for-sale securities unrealized holding (loss) gain	5,574	742	15,051	(11,280)
Reclassification for net gain on available-for-sale securities realized in earnings	(118)	(125)	(634)	(296)
Income tax expense related to available-for-sale securities realized in earnings	28	30	152	71
Changes in fair value of junior subordinated debentures related to instrument specific credit risk	(7,333)	(208)	(7,879)	9,483
Income tax benefit (expense) related to junior subordinated debentures	1,760	50	1,891	(2,276)
Other comprehensive (loss) income	(23,312)	(2,601)	(54,130)	42,702
COMPREHENSIVE INCOME	$ 26,572	$ 33,947	$ 96,991	$ 119,673