CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Unrealized gains (losses)	$ (12,747)	$ (26,975)	$ 3,993	$ (114,107)
Amortization of unrealized (gains) losses on securities reclassified to held-to-maturity, tax (benefit) expense	(1,386)	37,830	(2,702)	37,839
Change in unfunded pension liability related to unrealized loss, prior service cost and transition obligation, tax benefit	(17)	(9)	(28)	(17)
Reclassification adjustment related to derivatives, tax expense	(466)	0	(361)	0
Amortization of unrealized gain on terminated cash flow hedges, tax benefit	13	13	25	25
Equity method investment tax benefit	$ (32)	59	(33)	59
Fannie Mae (FNMA) mortgage-backed securities (MBS)
Amortization of unrealized (gains) losses on securities reclassified to held-to-maturity, tax (benefit) expense		$ 119,800		$ 119,800
Securities transferred to held-to-maturity from available-for-sale, book value			$ 1,100,000