CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Net change in unrealized (losses) gains, tax (benefit) expense		$ (11,955)	$ 20,085	$ (167,261)
Net change in unrealized (losses) gains on securities reclassified to held-to-maturity, tax (benefit) expense		4,774	5,361	34,319
Change in unfunded pension liability related to unrealized (loss) gain , prior service cost, tax benefit (expense)		269	1	(5)
Net change in cash flow hedge, tax (benefit) expense		(2,809)	504	0
Amortization of unrealized gain on terminated cash flow hedges, tax benefit		0	(34)	(51)
Equity method investment tax (benefit) expense		$ (16)	$ (27)	$ 67
Fannie Mae (FNMA) mortgage-backed securities (MBS)
Net change in unrealized (losses) gains on securities reclassified to held-to-maturity, tax (benefit) expense	$ (119,800)
Securities transferred to held-to-maturity from available-for-sale, book value	$ 1,100,000