CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Unrealized gain (loss) on securities, net of income tax (benefit) expense		$ 4,400	$ (84,500)	$ (20,600)
Reclassification adjustment for net (loss) gain on sale of securities included in net income, net of income tax		(71,800)	488	4,800
Unrealized loss on securities transferred from available-for-sale to held-to maturity, income tax (benefit)		(14,300)	(19,100)	(1,900)
Amortization of unrealized loss on securities transferred from available-for-sale to held-to-maturity, income tax expense	[1]	$ 4,200	$ 1,900	$ 70

[1] (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.