Consolidated Statements of Stockholders' Equity - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Preferred Stock
Dividends declared per share (usd per share)	$ 1.00
Shares, Outstanding at Dec. 31, 2019		119,781,605
Total stockholders' equity at Dec. 31, 2019	$ 4,954,697,000	$ 1,219,000	$ 3,306,006,000	$ 1,652,248,000	$ (83,434,000)	$ 78,658,000
New Accounting Pronouncement Or Change In Accounting Principle Effect Of Change of Income Taxes	(5,283,000)			(5,283,000)
Net Income	(1,237,574,000)			(1,237,574,000)
net of tax	93,865,000					93,865,000
Restricted stock awarded and earned stock compensation, net of shares forfeited, shares		800,537
net of shares forfeited	24,363,000	$ 8,000	24,355,000
Restricted stock surrendered, shares		(213,578)
Stock Repurchase Program	(5,369,000)				(5,369,000)
Dividend reinvestment, shares		(1,953,711)
Stock Repurchase Program, Number of Shares Authorized to be Repurchased		$ (20,000)
Dividend reinvestment	(70,000,000)		(69,980,000)
Common stock, $1.00/share	(159,748,000)		(159,748,000)
Shares, Outstanding at Dec. 31, 2020		118,414,853
Total stockholders' equity at Dec. 31, 2020	$ 3,594,951,000	$ 1,207,000	3,100,633,000	409,391,000	(88,803,000)	172,523,000
Dividends declared per share (usd per share)	$ 1.00
Net Income	$ 606,959,000			606,959,000
net of tax	(106,555,000)					(106,555,000)
Restricted stock awarded and earned stock compensation, net of shares forfeited, shares		1,369,019
net of shares forfeited	32,223,000	$ 14,000	32,209,000
Restricted stock surrendered, shares		(199,018)
Stock Repurchase Program	(8,505,000)				(8,505,000)
Common stock, $1.00/share	(119,443,000)		(119,443,000)
Shares, Outstanding at Dec. 31, 2021		119,584,854
Total stockholders' equity at Dec. 31, 2021	$ 3,999,630,000	$ 1,221,000	3,013,399,000	1,016,350,000	(97,308,000)	65,968,000
Dividends declared per share (usd per share)	$ 1.35
Net Income	$ 423,613,000			423,613,000
net of tax	(856,871,000)					(856,871,000)
Restricted stock awarded and earned stock compensation, net of shares forfeited, shares		894,704
net of shares forfeited	34,769,000	$ 9,000	34,760,000
Restricted stock surrendered, shares		(257,501)
Stock Repurchase Program	(9,531,000)				(9,531,000)
Common stock, $1.00/share	(120,256,000)		(120,256,000)
Shares, Outstanding at Dec. 31, 2022		120,222,057
Total stockholders' equity at Dec. 31, 2022	3,950,531,000	$ 1,230,000	$ 2,927,903,000	$ 1,420,624,000	$ (106,839,000)	$ (790,903,000)	$ 498,516,000
Stock Issued During Period, Value, New Issues	498,516,000						$ 498,516,000
Dividends, Preferred Stock	$ (19,339,000)
Preferred Stock, Dividends Per Share, Declared	$ 0.94