Consolidated Statements of Stockholders' Equity - 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
Common stock, beginning balance (in shares) at Dec. 31, 2020				134,144
Treasury stock, beginning balance (in shares) at Dec. 31, 2020							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	70,887										70,887
Other comprehensive income (loss)	1,302											1,302
Share repurchases (in shares)							3,012
Share repurchases	(96,382)						$ (96,382)
Indirect repurchase of shares for minimum tax withholding (in shares)							92
Indirect repurchase of shares for minimum tax withholding	(3,037)						$ (3,037)
Restricted stock units and awards and Performance share units (in shares)					80
Restricted stock units and awards and Performance share units		$ 0			$ 1				$ (1)
Stock options exercised (in shares)				647
Stock options exercised	7,311			$ 7				7,304
Share-based compensation	11,407							11,407
Business acquisitions (in shares)				316
Business acquisitions	10,440			$ 3				10,437
Common stock, ending balances (in shares) at Dec. 31, 2021				135,187
Treasury stock, ending balance (in shares) at Dec. 31, 2021							83,149
Ending 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	105,354										105,354
Other comprehensive income (loss)	4,571											4,571
Share repurchases (in shares)							2,778
Share repurchases	(122,773)						$ (122,773)
Indirect repurchase of shares for minimum tax withholding (in shares)							188
Indirect repurchase of shares for minimum tax withholding	(7,289)						$ (7,289)
Restricted stock units and awards and Performance share units (in shares)					120	211
Restricted stock units and awards and Performance share units		0	$ 0		$ 1	$ 2			(1)	$ (2)
Stock options exercised (in shares)				670
Stock options exercised	10,035			$ 7				10,028
Share-based compensation	14,689							14,689
Business acquisitions (in shares)				107
Business acquisitions	$ 4,317			$ 1				4,316
Common stock, ending balances (in shares) at Dec. 31, 2022	136,295			136,295
Treasury stock, ending balance (in shares) at Dec. 31, 2022	86,115						86,115
Ending balance at Dec. 31, 2022	$ 713,452			$ 1,363			$ (824,778)	799,147			734,116	3,604
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	120,968										120,968
Other comprehensive income (loss)	(1,826)											(1,826)
Share repurchases (in shares)							1,285
Share repurchases	(65,142)						$ (65,142)
Indirect repurchase of shares for minimum tax withholding (in shares)							173
Indirect repurchase of shares for minimum tax withholding	$ (8,448)						$ (8,448)
Restricted stock units and awards and Performance share units (in shares)					153	244
Restricted stock units and awards and Performance share units		$ 0	$ 0		$ 2	$ 2			$ (2)	$ (2)
Stock options exercised (in shares)	453			453
Stock options exercised	$ 8,764			$ 5				8,759
Share-based compensation	12,286							12,286
Business acquisitions (in shares)				242
Business acquisitions	11,735			$ 2				11,733
Excise tax on share repurchases	$ (171)						$ (725)	554
Common stock, ending balances (in shares) at Dec. 31, 2023	137,387			137,387
Treasury stock, ending balance (in shares) at Dec. 31, 2023	87,573						87,573
Ending balance at Dec. 31, 2023	$ 791,618			$ 1,374			$ (899,093)	$ 832,475			$ 855,084	$ 1,778