Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Restricted Stock Units and Awards	Performance share units	Common Stock	Common Stock Restricted Stock Units and Awards	Common Stock Performance share units	Treasury Shares	Additional Paid-In Capital	Additional Paid-In Capital Restricted Stock Units and Awards	Additional Paid-In Capital Performance share units	Retained Earnings	Accumulated Other Comprehensive (Loss) Income
Beginning balance (in shares) at Dec. 31, 2020				134,144			80,045
Beginning balance at Dec. 31, 2020	$ 702,620			$ 1,341			$ (595,297)	$ 740,970			$ 557,875	$ (2,269)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	50,209										50,209
Other comprehensive income	854											854
Share repurchases (in shares)							1,117
Share repurchases	(32,678)						$ (32,678)
Indirect repurchase of shares for minimum tax withholding (in shares)							47
Indirect repurchase of shares for minimum tax withholding	(1,464)						$ (1,464)
Restricted stock units and awards and Performance share units (in shares)				46
Restricted stock units and awards and Performance share units	0			$ 1				(1)
Stock options exercised (in shares)				397
Stock options exercised	4,408			$ 4				4,404
Stock-based compensation	2,855							2,855
Business acquisitions (in shares)				38
Business acquisitions	979							979
Ending balance (in shares) at Mar. 31, 2021				134,625			81,209
Ending balance at Mar. 31, 2021	727,783			$ 1,346			$ (629,439)	749,207			608,084	(1,415)
Beginning balance (in shares) at Dec. 31, 2021				135,187			83,149
Beginning balance at Dec. 31, 2021	704,548			$ 1,352			$ (694,716)	770,117			628,762	(967)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	58,127										58,127
Other comprehensive income	1,925											1,925
Share repurchases (in shares)							148
Share repurchases	(5,999)						$ (5,999)
Indirect repurchase of shares for minimum tax withholding (in shares)							165
Indirect repurchase of shares for minimum tax withholding	$ (6,373)						$ (6,373)
Restricted stock units and awards and Performance share units (in shares)					92	211
Restricted stock units and awards and Performance share units		$ 0	$ 0		$ 1	$ 2			$ (1)	$ (2)
Stock options exercised (in shares)	247			247
Stock options exercised	$ 3,224			$ 3				3,221
Stock-based compensation	3,689							3,689
Business acquisitions (in shares)				19
Business acquisitions	707							707
Ending balance (in shares) at Mar. 31, 2022				135,756			83,462
Ending balance at Mar. 31, 2022	$ 759,848			$ 1,358			$ (707,088)	$ 777,731			$ 686,889	$ 958