Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock
Beginning balance at Dec. 31, 2022	$ 3,949,577	$ 0	$ 105,218	$ 529,661	$ (2,790,313)	$ 6,894,535	$ (789,524)
Increase (Decrease) in Stockholders' Equity
Comprehensive income (loss)	52,830				(170,780)	223,610
Common dividends declared	(21,542)					(21,542)
Acquisition of treasury stock	(179,276)						(179,276)
Stock-based compensation	7,678			(1,022)			8,700
Exercise of stock options	37,024					(4,059)	41,083
Ending balance at Mar. 31, 2023	3,846,291	0	105,218	528,639	(2,961,093)	7,092,544	(919,017)
Beginning balance at Dec. 31, 2023	4,486,803	0	102,218	532,474	(2,772,419)	7,478,813	(854,283)
Increase (Decrease) in Stockholders' Equity
Comprehensive income (loss)	559,400				305,183	254,217
Common dividends declared	(22,603)					(22,603)
Acquisition of treasury stock	(23,469)						(23,469)
Stock-based compensation	9,267			(5,612)		(438)	15,317
Exercise of stock options	29,763					(3,334)	33,097
Ending balance at Mar. 31, 2024	$ 5,039,161	$ 0	$ 102,218	$ 526,862	$ (2,467,236)	$ 7,706,655	$ (829,338)