Consolidated Statements of Comprehensive Income (Loss) - 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	$ 80,574	$ 65,898	$ 222,918	$ 201,936
OTHER COMPREHENSIVE INCOME (LOSS)
Unrealized holding gains (losses) arising during the period on available-for-sale securities	(41,398)	4,975	(95,313)	82,703
Less: Reclassification adjustment for realized gains included in net income	5,248	22,305	15,846	54,790
Less: Realized loss on available-for-sale securities interest rate hedges	(13,722)	0	(13,722)	0
Amortization of securities transferred from available for sale to held to maturity	1,106	0	1,106	0
Other comprehensive income (loss), before tax effect	(31,818)	(17,330)	(96,331)	27,913
Less: Tax effect of other comprehensive income (loss)	(8,316)	(4,529)	(25,176)	7,295
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	(23,502)	(12,801)	(71,155)	20,618
COMPREHENSIVE INCOME	$ 57,072	$ 53,097	$ 151,763	$ 222,554