Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss, Net	Accumulated Earnings	Treasury Stock
Beginning balance at Dec. 31, 2020	$ 1,090,428	$ 82	$ 1,968,930	$ (99,228)	$ 2,255,467	$ (3,034,823)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	164,100				164,100
Other comprehensive income (loss)	6,050			6,050
Issuances under stock plans	5,380		(1,543)			6,923
Common share repurchases	(410,450)					(410,450)
Stock-based compensation expense	36,086		36,086
Ending balance at Mar. 31, 2021	891,594	82	2,003,473	(93,178)	2,419,567	(3,438,350)
Beginning balance at Dec. 31, 2021	371,058	82	2,074,896	(81,431)	3,049,027	(4,671,516)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	172,515				172,515
Other comprehensive income (loss)	(1,380)			(1,380)
Issuances under stock plans	6,964		579			6,385
Common share repurchases	(463,125)					(463,125)
Stock-based compensation expense	32,121		32,121
Ending balance at Mar. 31, 2022	$ 118,153	$ 82	$ 2,107,596	$ (82,811)	$ 3,221,542	$ (5,128,256)