CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income		$ 46,030	$ 73,363	$ 166,228	$ 210,070
Other comprehensive income (loss), net of tax:
Unrealized (loss) gain on securities available-for-sale, net of income taxes	[1]	(15,684)	(68,070)	5,166	(227,135)
Reclassification adjustment for net loss (gain) on sales of securities included in net income, net of income taxes	[2]	0	281	(99)	(1,222)
Net unrealized loss on securities transferred from available-for-sale to held-to-maturity, net of income taxes	[3]	0	0	(36,076)	(47,884)
Amortization of unrealized loss on securities transferred from available-for-sale to held-to-maturity, net of income taxes	[4]	2,522	1,694	7,627	2,990
Other comprehensive loss, net of tax		(13,162)	(66,095)	(23,382)	(273,251)
Comprehensive income (loss), net of tax		$ 32,868	$ 7,268	$ 142,846	$ (63,181)

[1] Income tax (benefit) expense of the unrealized (loss) gain on securities was $(6.2) million and $(27.2) million for the three months ended September 30, 2023 and 2022, respectively, and $2.0 million and $(90.7) million for the nine months ended September 30, 2023 and 2022, respectively.

[2] Income tax (benefit) expense on the reclassification adjustment for net loss (gain) on sales of securities included in net income was $0 and $(112,000) for the three months ended September 30, 2023 and 2022, respectively, and $39,000 and $488,000 for the nine months ended September 30, 2023 and 2022, respectively.

[3] Income tax (benefit) expense on the unrealized loss on securities transferred from available-for-sale to held-to-maturity was $0 and $0 for the three months ended September 30, 2023 and 2022, respectively, and $(14.3) million and $(19.1) million for the nine months ended September 30, 2023 and 2022, respectively.

[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 $1.0 million and $677,000 for the three months ended September 30, 2023 and 2022, respectively, and $3.0 million and $1.2 million for the nine months ended September 30, 2023 and 2022, respectively.