CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Income and Comprehensive Income
Net income	$ 614,212	$ 541,342	$ 1,102,641
Other comprehensive income (loss) before tax:
Foreign currency translation adjustment	(6,837)	(7,793)	10,572
Adjustment of pension and postretirement benefit plans	22,652	23,052	7,811
Amortization of net losses	14,471	19,253	15,644
Unrealized net holding gains (losses) on debt securities arising during the period	101,442	391,633	(2,539,421)
Reclassification adjustment for gains included in net income	0	0	0
Amortization of unrealized losses of debt securities transfer from available-for-sale to held-to-maturity	179,563	172,883	41,642
Unrealized net gains (losses) on cash flow hedges	0	(30)	3,719
Reclassification adjustment for net (gains) losses included in net income	0	(41)	(960)
Other comprehensive income (loss) before tax	311,291	598,957	(2,460,993)
Income tax (expense) benefit	(77,000)	30,440	261,134
Total other comprehensive income (loss), net of tax	234,291	629,397	(2,199,859)
Comprehensive income (loss), net of tax	$ 848,503	$ 1,170,739	$ (1,097,218)