Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment		Common Stock	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment		Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative adjustment	$ 4,056,442	$ (244)	[1]	$ 3,512,874	$ 602,482	$ (244)	[1]	$ (58,914)
Balance, shares at Dec. 31, 2018				220,255,039
Balance, value at Dec. 31, 2018	4,056,442	(244)	[1]	$ 3,512,874	602,482	(244)	[1]	(58,914)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	354,095				354,095
Other comprehensive income (loss), net of tax	88,463							88,463
Stock-based compensation	8,373			$ 8,373
Stock repurchased and retired, shares				(415,403)
Stock repurchased and retired	(7,268)			$ (7,268)
Issuances of common stock under stock plans, shares				389,646
Issuances of common stock under stock plans	21			$ 21
Cash dividends on common stock	(185,967)				(185,967)
Balance, shares at Dec. 31, 2019				220,229,282
Balance, value at Dec. 31, 2019	4,313,915	(40,181)	[2]	$ 3,514,000	770,366	(40,181)	[2]	29,549
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative adjustment	4,313,915	$ (40,181)	[2]	3,514,000	770,366	$ (40,181)	[2]	29,549
Net income (loss)	(1,523,420)				(1,523,420)
Other comprehensive income (loss), net of tax	93,196							93,196
Stock-based compensation	9,254			$ 9,254
Stock repurchased and retired, shares				(494,009)
Stock repurchased and retired	(8,655)			$ (8,655)
Issuances of common stock under stock plans, shares				491,062
Issuances of common stock under stock plans	0			$ 0
Cash dividends on common stock	$ (139,532)				(139,532)
Balance, shares at Dec. 31, 2020	220,226,335			220,226,335
Balance, value at Dec. 31, 2020	$ 2,704,577			$ 3,514,599	(932,767)			122,745
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative adjustment	2,704,577			3,514,599	(932,767)			122,745
Net income (loss)	420,300				420,300
Other comprehensive income (loss), net of tax	(120,986)							(120,986)
Stock-based compensation	10,906			$ 10,906
Stock repurchased and retired, shares				(4,158,387)
Stock repurchased and retired	(80,690)			$ (80,690)
Issuances of common stock under stock plans, shares				557,558
Issuances of common stock under stock plans	34			$ 34
Cash dividends on common stock	$ (184,871)				(184,871)
Balance, shares at Dec. 31, 2021	216,625,506			216,625,506
Balance, value at Dec. 31, 2021	$ 2,749,270			$ 3,444,849	(697,338)			1,759
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative adjustment	$ 2,749,270			$ 3,444,849	$ (697,338)			$ 1,759

[1] The cumulative effect adjustment relates to the implementation of new accounting guidance on January 1, 2019, for operating leases.

[2] The cumulative effect adjustment relates to the implementation of new accounting guidance on January 1, 2020, for the allowance for credit losses.