Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Surplus	Accumulated Other Comprehensive (Loss) Income	Undivided Profits
Balance at Dec. 31, 2020	$ 2,976,656	$ 767	$ 1,081	$ 2,014,076	$ 59,726	$ 901,006
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive (loss) income	94,691				(47,653)	142,344
Stock issued for employee stock purchase plan	1,170		1	1,169
Stock-based compensation plans, net	8,965		3	8,962
Stock repurchases	(3,080)		(1)	(3,079)
Dividends, Preferred Stock	(26)					(26)
Dividends on common stock	(39,010)					(39,010)
Balance at Jun. 30, 2021	3,039,366	767	1,084	2,021,128	12,073	1,004,314
Balance at Mar. 31, 2021	2,930,775	767	1,083	2,017,188	(37,176)	948,913
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive (loss) income	124,173				49,249	74,924
Stock-based compensation plans, net	3,941		1	3,940
Dividends, Preferred Stock	(13)					(13)
Dividends on common stock	(19,510)					(19,510)
Balance at Jun. 30, 2021	3,039,366	767	1,084	2,021,128	12,073	1,004,314
Balance at Dec. 31, 2021	3,248,841	0	1,127	2,164,989	(10,545)	1,093,270
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive (loss) income	(347,334)				(439,883)	92,549
Stock issued for employee stock purchase plan	1,151		1	1,150
Stock-based compensation plans, net	4,259		2	4,257
Stock issued for Spirit acquisition - 18,275,074 shares	464,918		183	464,735
Stock repurchases	(66,096)		(25)	(66,071)
Dividends on common stock	(45,844)					(45,844)
Balance at Jun. 30, 2022	3,259,895	0	1,288	2,569,060	(450,428)	1,139,975
Balance at Mar. 31, 2022	2,961,607	0	1,125	2,150,453	(326,961)	1,136,990
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive (loss) income	(96,013)				(123,467)	27,454
Stock-based compensation plans, net	3,893			3,893
Stock issued for Spirit acquisition - 18,275,074 shares	464,918		183	464,735
Stock repurchases	(50,041)		(20)	(50,021)
Dividends on common stock	(24,469)					(24,469)
Balance at Jun. 30, 2022	$ 3,259,895	$ 0	$ 1,288	$ 2,569,060	$ (450,428)	$ 1,139,975