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Stockholders' Equity Stockholders' Equity	9 Months Ended
Stockholders' Equity Stockholders' Equity	Sep. 30, 2019
Equity [Abstract]
Stockholders' Equity	4. Stockholders' Equity Share Repurchases During the third quarter of 2019, the Company repurchased 348,901 shares of the Company's common stock in the open market at an average price of $61.44 per share, for a total of $21.4 million. For the nine months ended September 30, 2019, the Company repurchased 854,349 shares of the Company's common stock in the open market at an average price of $60.21 per share, for a total of $51.4 million. As of September 30, 2019, approximately $48.6 million remains available for repurchase under the previously announced $100.0 million share repurchase authorization (which expires at the end of 2019).