CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net change in unrealized losses, tax expense (benefit)	$ (26,975)	$ 7,615	$ (114,107)	$ (14,361)
Reclassification adjustment for gains, tax expense	0	0	0	79
Amortization of unrealized gain on securities reclassified to held-to-maturity, tax expense	37,830	9	37,839	14
Change in unfunded pension liability related to unrealized loss, prior service cost and transition obligation, tax benefit	(9)	(8)	(17)	(13)
Reclassification adjustment related to derivatives, tax expense	0	0	0	0
Amortization of unrealized gain on terminated cash flow hedges, tax benefit	(13)	(35)	(25)	(70)
Equity method investment tax expense	59	$ 0	$ 59	$ 86
Fannie Mae (FNMA) mortgage-backed securities (MBS)
Amortization of unrealized gain 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