CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2018		73,306	29,656
Beginning balance at Dec. 31, 2018	$ 150,308	$ 103	$ (397,491)	$ 481,133	$ 121,215	$ (54,652)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	3,634			3,634
Exercises of stock options, issuance of restricted stock awards, and vests of restricted stock units (in shares)		836	49
Exercises of stock options, issuance of restricted stock awards, and vests of restricted stock units	(1,061)	$ 1	$ (1,227)	165
Repurchases of common stock (in shares)		(2,133)	2,133
Repurchases of common stock	(53,478)		$ (53,478)
Net income	24,710				24,710
Other comprehensive loss	(941)					(941)
Ending balance (in shares) at Mar. 31, 2019		72,009	31,838
Ending balance at Mar. 31, 2019	122,945	$ 104	$ (452,196)	484,932	145,698	(55,593)
Beginning balance (in shares) at Dec. 31, 2019		68,232	35,796
Beginning balance at Dec. 31, 2019	131,905	$ 104	$ (546,208)	495,903	240,485	(58,379)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	3,964			3,964
Exercises of stock options, issuance of restricted stock awards, and vests of restricted stock units (in shares)		702	115
Exercises of stock options, issuance of restricted stock awards, and vests of restricted stock units	(2,242)	$ 1	$ (2,573)	330
Repurchases of common stock (in shares)		(1,559)	1,559
Repurchases of common stock	(39,159)		$ (39,159)
Net income	11,091				11,091
Other comprehensive loss	(11,530)					(11,530)
Ending balance (in shares) at Mar. 31, 2020		67,375	37,470
Ending balance at Mar. 31, 2020	$ 94,029	$ 105	$ (587,940)	$ 500,197	$ 251,576	$ (69,909)