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Share Based Award Options exercised data (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Share-based Payment Arrangement [Abstract] |  |  |
Intrinsic value of options exercised | $ 22,976 | $ 51,105 | $ 71,283
Cash received from exercise of stock options | 7,732 | 14,275 | 32,003
Tax benefit from stock option exercises | $ 9,653 | $ 12,617 | $ 20,004

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