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v3.8.0.1

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock [Member] | Treasury Stock [Member] | Additional Paid-In Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Loss [Member]
--- | --- | --- | --- | --- | --- | ---
Balance, Amount at Dec. 31, 2014 | $ 399,845 | $ 1,188 | $ (425,685) | $ 604,284 | $ 220,753 | $ (695)
Balance, Shares at Dec. 31, 2014 |  | 118,820 | 69,333 |  |  |
Net income | 34,107 |  |  |  | 34,107 |
Other comprehensive income | 62 |  |  |  |  | 62
Share repurchases | (36,482) |  | $ (36,482) |  |  |
Share repurchases, Shares |  |  | 3,895 |  |  |
Restricted stock |  | $ 4 |  | (4) |  |
Restricted stock, Shares |  | 360 |  |  |  |
Stock options exercised | 10,728 | $ 15 |  | 10,713 |  |
Stock options exercised, Shares |  | 1,548 |  |  |  |
Share-based compensation | 5,729 |  |  | 5,729 |  |
Tax benefit (expense) from employee share plans | 772 |  |  | 772 |  |
Convertible bond retirement | 9,473 | $ 51 |  | 9,422 |  |
Convertible bond retirement, Shares |  | 5,069 |  |  |  |
Business acquisitions | 3,714 | $ 4 |  | 3,710 |  |
Business acquisitions, Shares |  | 385 |  |  |  |
Balance, Amount at Dec. 31, 2015 | 427,948 | $ 1,262 | $ (462,167) | 634,626 | 254,860 | (633)
Balance, Shares at Dec. 31, 2015 |  | 126,182 | 73,228 |  |  |
Net income | 40,065 |  |  |  | 40,065 |
Other comprehensive income | 129 |  |  |  |  | 129
Share repurchases | (9,144) |  | $ (9,144) |  |  |
Share repurchases, Shares |  |  | 919 |  |  |
Restricted stock |  | $ 3 |  | (3) |  |
Restricted stock, Shares |  | 300 |  |  |  |
Stock options exercised | 8,070 | $ 11 |  | 8,059 |  |
Stock options exercised, Shares |  | 1,128 |  |  |  |
Share-based compensation | 5,725 |  |  | 5,725 |  |
Tax benefit (expense) from employee share plans | 1,004 |  |  | 1,004 |  |
Business acquisitions | 6,224 | $ 6 |  | 6,218 |  |
Business acquisitions, Shares |  | 581 |  |  |  |
Balance, Amount at Dec. 31, 2016 | 480,021 | $ 1,282 | $ (471,311) | 655,629 | 294,925 | (504)
Balance, Shares at Dec. 31, 2016 |  | 128,191 | 74,147 |  |  |
Net income | 50,377 |  |  |  | 50,377 |
Other comprehensive income | 322 |  |  |  |  | 322
Share repurchases | (19,735) |  | $ (19,735) |  |  |
Share repurchases, Shares |  |  | 1,337 |  |  |
Restricted stock |  | $ 3 |  | (3) |  |
Restricted stock, Shares |  | 292 |  |  |  |
Stock options exercised | $ 8,008 | $ 12 |  | 7,996 |  |
Stock options exercised, Shares | 1,176 | 1,176 |  |  |  |
Share-based compensation | $ 5,705 |  |  | 5,705 |  |
Business acquisitions | 6,181 | $ 4 |  | 6,177 |  |
Business acquisitions, Shares |  | 416 |  |  |  |
Balance, Amount at Dec. 31, 2017 | $ 530,879 | $ 1,301 | $ (491,046) | $ 675,504 | $ 345,302 | $ (182)
Balance, Shares at Dec. 31, 2017 |  | 130,075 | 75,484 |  |  |

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