CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Series B Preferred Stock	Preferred Stock Shares	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Retained Earnings Series B Preferred Stock
Beginning Balance, issued (in shares) at Dec. 31, 2020			2,510,696	456,729,251
Beginning Balance (in shares) at Dec. 31, 2020					81,441,252
Beginning Balance (in shares) at Dec. 31, 2020				375,287,999
Beginning Balance at Dec. 31, 2020	$ 2,562,835		$ 251,070	$ 91,346	$ (798,993)	$ 1,331,247	$ (34,200)	$ 1,722,365
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	854,248							854,248
Other comprehensive income (loss), net of tax	14,497						14,497
Total comprehensive income	868,745
Cash dividends declared:
Common Stock	(29,104)							(29,104)
Preferred Stock		$ (3,559)							$ (3,559)
Dividend equivalent units related to employee stock-based compensation plans	$ (17)					522		(539)
Issuance of common shares (in shares)	3,785,490			3,785,490
Issuance of common shares	$ 4,891			$ 757		4,134
Stock-based compensation expense	24,254					24,254
Common stock repurchased and cancelled (in shares)				(28,502,460)
Common stock repurchased and cancelled	$ (472,482)			$ (5,700)		(466,782)
Common stock repurchased (in shares)	(84,528,256)			(56,025,796)	(56,025,796)
Common stock repurchased	$ (804,199)				$ (978,883)	174,684
Shares repurchased related to employee stock-based compensation plans (in shares)	(1,367,826)			(1,367,826)	(1,367,826)
Shares repurchased related to employee stock-based compensation plans	$ (20,103)				$ (20,103)
Ending Balance, issued (in shares) at Sep. 30, 2021			2,510,696	432,012,281
Ending Balance (in shares) at Sep. 30, 2021					138,834,874
Ending Balance (in shares) at Sep. 30, 2021				293,177,407
Ending Balance at Sep. 30, 2021	2,131,261		$ 251,070	$ 86,403	$ (1,797,979)	1,068,059	(19,703)	2,543,411
Beginning Balance, issued (in shares) at Jun. 30, 2021			2,510,696	431,508,098
Beginning Balance (in shares) at Jun. 30, 2021					125,700,875
Beginning Balance (in shares) at Jun. 30, 2021				305,807,223
Beginning Balance at Jun. 30, 2021	2,303,378		$ 251,070	$ 86,302	$ (1,551,724)	1,058,698	(21,640)	2,480,672
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	72,840							72,840
Other comprehensive income (loss), net of tax	1,937						1,937
Total comprehensive income	74,777
Cash dividends declared:
Common Stock	(8,934)							(8,934)
Preferred Stock		(1,166)							(1,166)
Dividend equivalent units related to employee stock-based compensation plans	$ (1)					0		(1)
Issuance of common shares (in shares)	504,183			504,183
Issuance of common shares	$ 2,870			$ 101		2,769
Stock-based compensation expense	6,686					6,686
Fees related to first-quarter 2021 common stock tender offer	$ (94)					(94)
Common stock repurchased (in shares)	(13,018,585)			(13,018,585)	(13,018,585)
Common stock repurchased	$ (244,082)				$ (244,082)	0
Shares repurchased related to employee stock-based compensation plans (in shares)	(115,414)			(115,414)	(115,414)
Shares repurchased related to employee stock-based compensation plans	$ (2,173)				$ (2,173)
Ending Balance, issued (in shares) at Sep. 30, 2021			2,510,696	432,012,281
Ending Balance (in shares) at Sep. 30, 2021					138,834,874
Ending Balance (in shares) at Sep. 30, 2021				293,177,407
Ending Balance at Sep. 30, 2021	$ 2,131,261		$ 251,070	$ 86,403	$ (1,797,979)	1,068,059	(19,703)	2,543,411
Beginning Balance, issued (in shares) at Dec. 31, 2021			2,510,696	432,013,372
Beginning Balance (in shares) at Dec. 31, 2021	153,100,000				153,056,639
Beginning Balance (in shares) at Dec. 31, 2021				278,956,733
Beginning Balance at Dec. 31, 2021	$ 2,149,711		$ 251,070	$ 86,403	$ (2,061,383)	1,074,384	(17,897)	2,817,134
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	546,057							546,057
Other comprehensive income (loss), net of tax	(75,580)						(75,580)
Total comprehensive income	470,477
Cash dividends declared:
Common Stock	(86,219)							(86,219)
Preferred Stock		(5,563)							(5,563)
Dividend equivalent units related to employee stock-based compensation plans	$ (557)					245		(802)
Issuance of common shares (in shares)	3,093,392			3,093,392
Issuance of common shares	$ 990			$ 619		371
Stock-based compensation expense	$ 27,050					26,761		289
Common stock repurchased (in shares)	(30,721,944)			(30,721,944)	(30,721,944)
Common stock repurchased	$ (552,887)				$ (552,887)
Shares repurchased related to employee stock-based compensation plans (in shares)	(1,131,351)			(1,131,351)	(1,131,351)
Shares repurchased related to employee stock-based compensation plans	$ (20,774)				$ (20,774)
Ending Balance, issued (in shares) at Sep. 30, 2022			2,510,696	435,106,764
Ending Balance (in shares) at Sep. 30, 2022	184,900,000				184,909,934
Ending Balance (in shares) at Sep. 30, 2022				250,196,830
Ending Balance at Sep. 30, 2022	$ 1,982,228		$ 251,070	$ 87,022	$ (2,635,044)	1,101,761	(93,477)	3,270,896
Beginning Balance, issued (in shares) at Jun. 30, 2022			2,510,696	435,102,082
Beginning Balance (in shares) at Jun. 30, 2022					183,717,942
Beginning Balance (in shares) at Jun. 30, 2022				251,384,140
Beginning Balance at Jun. 30, 2022	1,976,810		$ 251,070	$ 87,021	$ (2,618,188)	1,095,296	(63,999)	3,225,610
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	75,172							75,172
Other comprehensive income (loss), net of tax	(29,478)						(29,478)
Total comprehensive income	45,694
Cash dividends declared:
Common Stock	(27,643)							(27,643)
Preferred Stock		$ (2,531)							$ (2,531)
Dividend equivalent units related to employee stock-based compensation plans	$ (540)					(539)		(1)
Issuance of common shares (in shares)	4,682			4,682
Issuance of common shares	$ 540			$ 1		539
Stock-based compensation expense	$ 6,754					6,465		289
Common stock repurchased (in shares)	(1,191,544)			(1,191,544)	(1,191,544)
Common stock repurchased	$ (16,849)				$ (16,849)
Shares repurchased related to employee stock-based compensation plans (in shares)	(448)			(448)	(448)
Shares repurchased related to employee stock-based compensation plans	$ (7)				$ (7)
Ending Balance, issued (in shares) at Sep. 30, 2022			2,510,696	435,106,764
Ending Balance (in shares) at Sep. 30, 2022	184,900,000				184,909,934
Ending Balance (in shares) at Sep. 30, 2022				250,196,830
Ending Balance at Sep. 30, 2022	$ 1,982,228		$ 251,070	$ 87,022	$ (2,635,044)	$ 1,101,761	$ (93,477)	$ 3,270,896