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v3.19.1

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDER'S EQUITY - USD ($) shares in Millions, $ in Millions | Total | Common Stock | Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss)
--- | --- | --- | --- | --- | ---
Shares Outstanding at Dec. 31, 2017 |  | 52.2 |  |  |
Total stockholders’ equity at Dec. 31, 2017 | $ 991.4 | $ 0.5 | $ 566.1 | $ 428.4 | $ (3.6)
Vesting of restricted stock units, value | (1.0) |  | (1.0) |  |
Employee stock purchase plan, shares |  | 0.1 |  |  |
Employee stock purchase plan, value | 4.3 |  | 4.3 |  |
Exercise of stock options, value | 0.1 |  | 0.1 |  |
Stock-based compensation expense | 4.9 |  | 4.9 |  |
Translation adjustments | 1.5 |  |  |  | 1.5
Net income | 29.1 |  |  | 29.1 |
Shares Outstanding at Mar. 31, 2018 |  | 52.3 |  |  |
Total stockholders’ equity at Mar. 31, 2018 | 1,030.3 | $ 0.5 | 574.4 | 457.5 | (2.1)
Shares Outstanding at Dec. 31, 2018 |  | 52.5 |  |  |
Total stockholders’ equity at Dec. 31, 2018 | 1,182.1 | $ 0.5 | 601.8 | 586.1 | (6.3)
Vesting of restricted stock units, shares |  | 0.2 |  |  |
Vesting of restricted stock units, value | (5.5) |  | (5.5) |  |
Employee stock purchase plan, shares |  | 0.1 |  |  |
Employee stock purchase plan, value | 6.9 |  | 6.9 |  |
Stock-based compensation expense | 10.0 |  | 10.0 |  |
Translation adjustments | (1.1) |  |  |  | (1.1)
Net income | 34.9 |  |  | 34.9 |
Shares Outstanding at Mar. 31, 2019 |  | 52.8 |  |  |
Total stockholders’ equity at Mar. 31, 2019 | $ 1,227.3 | $ 0.5 | $ 613.2 | $ 621.0 | $ (7.4)

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