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Equity Based Compensation	9 Months Ended
Equity Based Compensation	Sep. 30, 2019
Share-based Payment Arrangement [Abstract]
Equity Based Compensation	Equity Based Compensation Equity compensation expense was $29.3 million and $28.4 million in the first nine months of 2019 and 2018, respectively. In the first quarter of 2019, the Company granted 0.2 million stock appreciation rights at $145.25 weighted average exercise price per share and 0.1 million performance contingent units to employees. Additionally, non-employee directors were granted a total of 8,472 shares of common stock. As of September 30, 2019, 1.4 million share options at a weighted average strike price per share of $76.08 were vested and exercisable, with a remaining weighted average exercise period of 4.1 years. As of September 30, 2019, the total compensation cost of non-vested awards not yet recognized in the condensed consolidated financial statements was $26.5 million. It is estimated that these costs will vest over a weighted average period of 0.9 years.