CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income		$ 69,803	$ 66,904	$ 96,302	$ 136,707	$ 164,970
Other comprehensive (loss) income, net of tax:
Unrealized (loss) gain on securities available-for-sale arising, net of income taxes	[1]	(40,474)	(118,591)	45,343	(159,065)	(27,249)
Reclassification adjustment for net loss (gain) on sales of securities included in net income, net of income taxes	[2]	22	(1,525)	(3,630)	(1,503)	(6,519)
Net unrealized loss on securities transferred from available-for-sale to held-to-maturity, net of income taxes	[3]	(31,326)	(16,558)	0	(47,884)	0
Amortization of unrealized loss on securities transferred from available-for-sale to held-to-maturity, net of income taxes	[4]	993	303	0	1,296	0
Other comprehensive (loss) income, net of tax		(70,785)	(136,371)	41,713	(207,156)	(33,768)
Comprehensive (loss) income, net of tax		$ (982)	$ (69,467)	$ 138,015	$ (70,449)	$ 131,202

[1] Income tax (benefit) expense of the unrealized loss on securities was $(16.2) million, $(47.4) million, and $18.2 million for the three months ended June 30, 2022, March 31, 2022, and June 30, 2021, respectively, and $(63.5) million and $(10.9) million for the six months ended June 30, 2022 and June 30, 2021, respectively.

[2] Income tax (benefit) expense on the reclassification adjustment for net loss (gain) on sales of securities included in net income was $(9,000), $609,000, and $1.5 million for the three months ended June 30, 2022, March 31, 2022, and June 30, 2021, respectively, and $600,000 and $2.6 million for the six months ended June 30, 2022 and June 30, 2021, respectively.

[3] Income tax (benefit) on the unrealized loss on securities transferred from available-for-sale to held-to-maturity was $(12.5) million, $(6.6) million, and $0 for the three months ended June 30, 2022, March 31, 2022, and June 30, 2021, respectively, and $(19.1) million and $0 for the six months ended June 30, 2022 and June 30, 2021.

[4] Income tax expense on the amortization of unrealized loss on securities transferred from available-for-sale to held-to-maturity included in net income was $396,000, $121,000, and $0 for the three months ended June 30, 2022, March 31, 2022, and June 30, 2021, respectively, and $517,000 and $0 for the six months ended June 30, 2022 and June 30, 2021, respectively.