CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net change in unrealized losses, tax expense (benefit)	$ (63,954)	$ (8,094)	$ (178,061)	$ (22,457)
Reclassification adjustment for gains, tax expense	0	1	0	80
Amortization of unrealized gain (loss) on securities reclassified to held-to-maturity, tax expense	(1,884)	9	35,955	23
Change in unfunded pension liability related to unrealized loss, prior service cost and transition obligation, tax benefit	(10)	(7)	(27)	(20)
Amortization of unrealized gain on terminated cash flow hedges, tax benefit	(13)	(36)	(38)	(106)
Equity method investment tax expense	$ 8	$ 26	67	$ 112
Fannie Mae (FNMA) mortgage-backed securities (MBS)
Amortization of unrealized gain (loss) on securities reclassified to held-to-maturity, tax expense			119,800
Securities transferred to held-to-maturity from available-for-sale, book value			$ 1,100,000