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v3.19.1

EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Earning per share |  |  |
Authorized common stock (in shares) | 199,000 |  | 199,000
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 | $ 0.01
Income (Numerator) |  |  |
Income available to common stockholders, basic (in dollars) | $ 63,004 | $ 59,300 |
Income available to common stockholders, diluted (in dollars) | $ 63,004 | $ 59,300 |
Shares (Denominator) |  |  |
Basic (in shares) | 62,964 | 62,128 |
Total average equivalent shares | 65,349 | 64,414 |
Per Share Amount |  |  |
Net income per share, basic (in dollars per share) | $ 1.00 | $ 0.95 |
Net income per share, diluted (in dollars per share) | $ 0.96 | $ 0.92 |
Stock options |  |  |
Shares (Denominator) |  |  |
Effect of dilutive stock based compensation (in shares) | 2,222 | 2,216 |
Restricted stock units |  |  |
Shares (Denominator) |  |  |
Effect of dilutive stock based compensation (in shares) | 163 | 70 |

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