Unaudited Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Stockholders' Equity beginning balance at Dec. 31, 2020	$ 3,355,411	$ 126	$ 2,749,900	$ 5,416,945	$ (1,363,158)	$ (3,448,402)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	184,239			184,239
Other comprehensive income (loss), net of tax	(117,861)				(117,861)
Acquisition of common stock	(170,382)					(170,382)
Share-based compensation	17,747		17,747
Issuance of common stock	27,345	1	27,344
Stockholders' Equity ending balance at Mar. 31, 2021	3,296,499	127	2,794,991	5,601,184	(1,481,019)	(3,618,784)
Stockholders' Equity beginning balance at Dec. 31, 2021	2,866,580	127	2,878,751	6,256,442	(1,464,616)	(4,804,124)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	217,952			217,952
Other comprehensive income (loss), net of tax	201,179				201,179
Acquisition of common stock	(422,736)					(422,736)
Share-based compensation	32,631		32,631
Issuance of common stock	8,810	0	8,810
Stockholders' Equity ending balance at Mar. 31, 2022	$ 2,904,416	$ 127	$ 2,920,192	$ 6,474,394	$ (1,263,437)	$ (5,226,860)