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v3.20.4

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total | Cumulative-effect adjustment | Cumulative Effect, Period of Adoption, Adjusted Balance | Common Stock | Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance | Treasury Stock | Treasury Stock Cumulative Effect, Period of Adoption, Adjusted Balance | Additional Paid-In Capital | Additional Paid-In Capital Cumulative Effect, Period of Adoption, Adjusted Balance | Retained Earnings | Retained Earnings Cumulative-effect adjustment | Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance | Accumulated Other Comprehensive Loss | Accumulated Other Comprehensive Loss Cumulative-effect adjustment | Accumulated Other Comprehensive Loss Cumulative Effect, Period of Adoption, Adjusted Balance
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2017 |  |  |  | 130,075 | 130,075 | 75,484 | 75,484 |  |  |  |  |  |  |  |
Beginning balance at Dec. 31, 2017 | $ 530,879 | $ 2,091 | $ 532,970 | $ 1,301 | $ 1,301 | $ (491,046) | $ (491,046) | $ 675,504 | $ 675,504 | $ 345,302 | $ 2,091 | $ 347,393 | $ (182) |  | $ (182)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 61,570 |  |  |  |  |  |  |  |  | 61,570 |  |  |  |  |
Other comprehensive income (loss) | (300) |  |  |  |  |  |  |  |  |  |  |  | (300) |  |
Share repurchases (in shares) |  |  |  |  |  | 848 |  |  |  |  |  |  |  |  |
Share repurchases | (17,484) |  |  |  |  | $ (17,484) |  |  |  |  |  |  |  |  |
Restricted stock (in shares) |  |  |  | 272 |  |  |  |  |  |  |  |  |  |  |
Restricted stock | 0 |  |  | $ 3 |  |  |  | (3) |  |  |  |  |  |  |
Stock options exercised (in shares) |  |  |  | 864 |  |  |  |  |  |  |  |  |  |  |
Stock options exercised | 6,291 |  |  | $ 8 |  |  |  | 6,283 |  |  |  |  |  |  |
Share-based compensation | 6,866 |  |  |  |  |  |  | 6,866 |  |  |  |  |  |  |
Business acquisitions (in shares) |  |  |  | 193 |  |  |  |  |  |  |  |  |  |  |
Business acquisitions | 3,750 |  |  | $ 2 |  |  |  | 3,748 |  |  |  |  |  |  |
Ending balance (in shares) at Dec. 31, 2018 |  |  |  | 131,404 |  | 76,332 |  |  |  |  |  |  |  |  |
Ending balance at Dec. 31, 2018 | 593,663 | $ 0 |  | $ 1,314 |  | $ (508,530) |  | 692,398 |  | 408,963 | $ (101) |  | (482) | $ 101 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 70,714 |  |  |  |  |  |  |  |  | 70,714 |  |  |  |  |
Other comprehensive income (loss) | (299) |  |  |  |  |  |  |  |  |  |  |  | (299) |  |
Share repurchases (in shares) |  |  |  |  |  | 1,305 |  |  |  |  |  |  |  |  |
Share repurchases | (27,163) |  |  |  |  | $ (27,163) |  |  |  |  |  |  |  |  |
Restricted stock (in shares) |  |  |  | 228 |  |  |  |  |  |  |  |  |  |  |
Restricted stock | 0 |  |  | $ 2 |  |  |  | (2) |  |  |  |  |  |  |
Stock options exercised (in shares) |  |  |  | 1,210 |  |  |  |  |  |  |  |  |  |  |
Stock options exercised | 10,608 |  |  | $ 12 |  |  |  | 10,596 |  |  |  |  |  |  |
Share-based compensation | 7,254 |  |  |  |  |  |  | 7,254 |  |  |  |  |  |  |
Business acquisitions (in shares) |  |  |  | 214 |  |  |  |  |  |  |  |  |  |  |
Business acquisitions | 4,461 |  |  | $ 3 |  |  |  | 4,458 |  |  |  |  |  |  |
Ending balance (in shares) at Dec. 31, 2019 |  |  |  | 133,056 |  | 77,637 |  |  |  |  |  |  |  |  |
Ending balance at Dec. 31, 2019 | 659,238 |  |  | $ 1,331 |  | $ (535,693) |  | 714,704 |  | 479,576 |  |  | (680) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 78,299 |  |  |  |  |  |  |  |  | 78,299 |  |  |  |  |
Other comprehensive income (loss) | (1,589) |  |  |  |  |  |  |  |  |  |  |  | (1,589) |  |
Share repurchases (in shares) |  |  |  |  |  | 2,408 |  |  |  |  |  |  |  |  |
Share repurchases | $ (59,604) |  |  |  |  | $ (59,604) |  |  |  |  |  |  |  |  |
Restricted stock (in shares) |  |  |  | 25 |  |  |  |  |  |  |  |  |  |  |
Stock options exercised (in shares) | 634 |  |  | 634 |  |  |  |  |  |  |  |  |  |  |
Stock options exercised | $ 6,486 |  |  | $ 6 |  |  |  | 6,480 |  |  |  |  |  |  |
Share-based compensation | 8,869 |  |  |  |  |  |  | 8,869 |  |  |  |  |  |  |
Business acquisitions (in shares) |  |  |  | 429 |  |  |  |  |  |  |  |  |  |  |
Business acquisitions | 10,921 |  |  | $ 4 |  |  |  | 10,917 |  |  |  |  |  |  |
Ending balance (in shares) at Dec. 31, 2020 |  |  |  | 134,144 |  | 80,045 |  |  |  |  |  |  |  |  |
Ending balance at Dec. 31, 2020 | $ 702,620 |  |  | $ 1,341 |  | $ (595,297) |  | $ 740,970 |  | $ 557,875 |  |  | $ (2,269) |  |

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