CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income		$ 283,743	$ 339,889	$ 60,351
Other comprehensive (loss) income, net of tax:
Unrealized (loss) gain on securities available-for-sale arising during the period, net of income taxes	[1]	(212,822)	(51,563)	48,674
Reclassification adjustment for net (gain) on sale of securities included in net income, net of income tax	[2]	(1,222)	(12,072)	(9,905)
Net unrealized loss on securities transferred from available-for-sale to held-to-maturity, net of income taxes	[3]	(47,884)	(4,692)	0
Amortization of unrealized loss on securities transferred from available-for-sale to held-to-maturity, net of income taxes	[4]	4,543	173	0
Other comprehensive (loss) income, net of tax		(257,385)	(68,154)	38,769
Comprehensive income, net of tax		$ 26,358	$ 271,735	$ 99,120

[1] (1) Income tax (benefit) expense on unrealized (loss) gain on securities was $(84.5) million for 2022, $(20.6) million for 2021, and $19.5 million for 2020.

[2] (2) Income tax expense on reclassification adjustment for net gain on sale of securities included in net income was $488,000 for 2022, $4.8 million for 2021, and $4.0 million for 2020.

[3] (3) Income tax (benefit) on the unrealized loss on securities transferred from available-for-sale to held-to maturity was $(19.1) million for 2022, $(1.9) million for 2021, and $0 for 2020.

[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 $1.9 million for 2022, $70,000 for 2021, and $0 for 2020.