Comprehensive Income - Components of Other Comprehensive Income (Loss) and Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Net Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, before tax			$ (1,066,177)	$ (172,054)
Unrealized holding gains (losses), net, before tax			3,392	(280,918)
Foreign currency translation adjustment, before tax			3,550	(7,873)
Unrealized losses on cash flow hedges			(207,774)	(174,371)
Total other comprehensive income (loss) before reclassifications, before tax			(200,832)	(463,162)
Amortization of unrealized holding losses on held-to-maturity securities				1,765
Accretion of net gain on terminated cash flow hedges, before tax			(61)	(60)
Net yield adjustment from cash flow hedges currently in effect, before tax			107,730	(57,966)
Amortization of prior service credit, before tax			(927)	(1,128)
Amortization of actuarial losses, before tax			(2,457)	9,206
Total other comprehensive income (loss), before tax			(96,547)	(511,345)
Ending balance, before tax	$ (1,162,724)	$ (683,399)	(1,162,724)	(683,399)
Beginning balance, tax			276,147	44,476
Unrealized holding losses, net, tax			(2,062)	72,691
Foreign currency translation adjustment, tax			(1,040)	1,961
Unrealized losses on cash flow hedges, tax			51,363	45,129
Total other comprehensive income (loss) before reclassifications, tax			48,261	119,781
Amortization of unrealized holding losses on held-to-maturity securities, tax				(456)
Accretion of net gain on terminated cash flow hedges, tax			16	17
Net yield adjustment from cash flow hedges currently in effect, tax			(26,631)	15,002
Amortization of prior service credit, tax			36	267
Amortization of actuarial losses, tax			95	(2,178)
Total other comprehensive income (loss), tax			21,777	132,433
Ending balance, tax	297,924	176,909	297,924	176,909
Beginning balance, net of tax			(790,030)	(127,578)
Unrealized holding losses, net of tax			1,330	(208,227)
Foreign currency translation adjustments, net of tax	1,316	(4,264)	2,510	(5,912)
Unrealized losses on cash flow hedges, net of tax			(156,411)	(129,242)
Total other comprehensive income (loss) before reclassifications, net of tax			(152,571)	(343,381)
Amortization of unrealized holding losses on held-to-maturity securities				1,309
Accretion of net gain on terminated cash flow hedges, net of tax			(45)	(43)
Net yield adjustment from cash flow hedges currently in effect, net of tax			81,099	(42,964)
Amortization of prior service credit, net of tax			(891)	(861)
Amortization of actuarial losses, net of tax			(2,362)	7,028
Total other comprehensive income (loss)	(219,795)	(129,105)	(74,770)	(378,912)
Ending balance, net of tax	(864,800)	(506,490)	(864,800)	(506,490)
Defined Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, before tax			(272,856)	(360,276)
Amortization of prior service credit, before tax			(927)	(1,128)
Amortization of actuarial losses, before tax			(2,457)	9,206
Total other comprehensive income (loss), before tax			(3,384)	8,078
Ending balance, before tax	(276,240)	(352,198)	(276,240)	(352,198)
Total other comprehensive income (loss)			(3,253)
Other [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, before tax			(349,129)	83,531
Foreign currency translation adjustment, before tax			3,550	(7,873)
Unrealized losses on cash flow hedges			(207,774)	(174,371)
Total other comprehensive income (loss) before reclassifications, before tax			(204,224)	(182,244)
Accretion of net gain on terminated cash flow hedges, before tax			(61)	(60)
Net yield adjustment from cash flow hedges currently in effect, before tax			107,730	(57,966)
Total other comprehensive income (loss), before tax			(96,555)	(240,270)
Ending balance, before tax	(445,684)	(156,739)	(445,684)	(156,739)
Investment Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, before tax			(444,192)	104,691
Unrealized holding gains (losses), net, before tax			3,392	(280,918)
Total other comprehensive income (loss) before reclassifications, before tax			3,392	(280,918)
Amortization of unrealized holding losses on held-to-maturity securities				1,765
Total other comprehensive income (loss), before tax			3,392	(279,153)
Ending balance, before tax	$ (440,800)	$ (174,462)	(440,800)	$ (174,462)
Total other comprehensive income (loss)			$ 1,330