Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 74,924	$ 58,802	$ 142,344	$ 136,038
OTHER COMPREHENSIVE INCOME (LOSS)
Unrealized holding gains (losses) arising during the period on available-for-sale securities	71,801	22,159	(53,916)	77,728
Less: Reclassification adjustment for realized gains included in net income	5,127	390	10,598	32,485
Other comprehensive income (loss), before tax effect	66,674	21,769	(64,514)	45,243
Less: Tax effect of other comprehensive income (loss)	17,425	5,689	(16,861)	11,824
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	49,249	16,080	(47,653)	33,419
COMPREHENSIVE INCOME	$ 124,173	$ 74,882	$ 94,691	$ 169,457