CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 23,541	$ 39,700	$ 40,423	$ 73,046
OTHER COMPREHENSIVE INCOME, NET OF INCOME TAXES:
Unrealized holding gain on available-for-sale securities arising during the period	7,912	20,751	50,090	37,407
Income tax expense related to available-for-sale securities unrealized holding gain	1,899	4,981	12,022	8,978
Reclassification for net (gain) loss on available-for-sale securities realized in earnings	(93)	27	(171)	26
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, before Tax, after Reclassification Adjustment	(9,818)	296	9,691	470
Other Comprehensive Income (Loss), Change in Fair Value of Junior Subordinated Debentures, Tax	2,356	(71)	(2,326)	(113)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	22	(6)	41	(6)
Other comprehensive (loss) income	(1,520)	16,016	45,303	28,806
COMPREHENSIVE INCOME	$ 22,021	$ 55,716	$ 85,726	$ 101,852