CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income		$ 30,852	$ 283,743	$ 339,889
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on securities available-for-sale, net of income taxes	[1]	9,449	(212,822)	(51,563)
Reclassification adjustment for net loss (gain) on sale of securities included in net income, net of income tax	[2]	182,167	(1,222)	(12,072)
Net unrealized loss on securities transferred from available-for-sale to held-to-maturity, net of income taxes	[3]	(36,076)	(47,884)	(4,692)
Amortization of unrealized loss on securities transferred from available-for-sale to held-to-maturity, net of income taxes	[4]	10,082	4,543	173
Other comprehensive income (loss), net of tax		165,622	(257,385)	(68,154)
Comprehensive income, net of tax		$ 196,474	$ 26,358	$ 271,735

[1] (1) Income tax expense (benefit) on unrealized gain (loss) on securities was $4.4 million for 2023, $(84.5) million for 2022, and $(20.6) million for 2021.

[2] (2) Income tax (benefit) expense on reclassification adjustment for net (loss) gain on sale of securities included in net income was $(71.8) million for 2023, $488,000 for 2022, and $4.8 million for 2021.

[3] (3) Income tax (benefit) on the unrealized loss on securities transferred from available-for-sale to held-to maturity was $(14.3) million for 2023, $(19.1) million for 2022, and $(1.9) million for 2021.

[4] (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 $4.2 million for 2023, $1.9 million for 2022, and $70,000 for 2021.