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				375,287,999	(81,441,252)
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	641,207							641,207
Other comprehensive income (loss), net of tax	10,123						10,123
Total comprehensive income	651,330
Cash dividends declared:
Common Stock	(10,906)							(10,906)
Preferred Stock		$ (1,201)							$ (1,201)
Dividend equivalent units related to employee stock-based compensation plans	$ (16)					463		(479)
Issuance of common shares (in shares)	2,826,387			2,826,387
Issuance of common shares	$ 2,061			$ 565		1,496
Stock-based compensation expense	11,124					11,124
Common stock repurchased and cancelled (in shares)				(28,502,460)
Common stock repurchased and cancelled	$ (471,810)			$ (5,700)		(466,110)
Common stock repurchased (in shares)	(48,702,830)			(20,200,370)	(20,200,370)
Common stock repurchased	$ (120,640)				$ (295,324)	174,684
Shares repurchased related to employee stock-based compensation plans (in shares)	(1,059,980)			(1,059,980)	(1,059,980)
Shares repurchased related to employee stock-based compensation plans	$ (14,313)				$ (14,313)
Ending Balance, issued (in shares) at Mar. 31, 2021			2,510,696	431,053,178
Ending Balance (in shares) at Mar. 31, 2021				328,351,576	(102,701,602)
Ending Balance at Mar. 31, 2021	2,608,464		$ 251,070	$ 86,211	$ (1,108,630)	1,052,904	(24,077)	2,350,986
Beginning Balance, issued (in shares) at Dec. 31, 2021			2,510,696	432,013,372
Beginning Balance (in shares) at Dec. 31, 2021				278,956,733	(153,056,639)
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	128,812							128,812
Other comprehensive income (loss), net of tax	(21,617)						(21,617)
Total comprehensive income	107,195
Cash dividends declared:
Common Stock	(30,493)							(30,493)
Preferred Stock		$ (1,275)							$ (1,275)
Dividend equivalent units related to employee stock-based compensation plans	$ (16)					618		(634)
Issuance of common shares (in shares)	2,594,817			2,594,817
Issuance of common shares	$ 448			$ 519		(71)
Stock-based compensation expense	$ 11,921					11,921
Common stock repurchased (in shares)	(9,533,392)			(9,533,392)	(9,533,392)
Common stock repurchased	$ (175,943)				$ (175,943)
Shares repurchased related to employee stock-based compensation plans (in shares)	(934,602)			(934,602)	(934,602)
Shares repurchased related to employee stock-based compensation plans	$ (17,341)				$ (17,341)
Ending Balance, issued (in shares) at Mar. 31, 2022			2,510,696	434,608,189
Ending Balance (in shares) at Mar. 31, 2022				271,083,556	(163,524,633)
Ending Balance at Mar. 31, 2022	$ 2,044,207		$ 251,070	$ 86,922	$ (2,254,667)	$ 1,086,852	$ (39,514)	$ 2,913,544