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Stockholders' Equity	9 Months Ended
Stockholders' Equity	Sep. 30, 2018
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity Share Repurchase Program On August 6, 2015, the Company's Board of Directors authorized a $100 million stock repurchase program for 3 years which commenced on November 5, 2015 and expires on November 4, 2018. Repurchases made under this program may be made in the open market as the Company deems appropriate and market conditions allow. There were no shares of common stock repurchased during the three and nine months ended September 30, 2018 and 2017. In August 2017, the Company repurchased 134,900 shares of its common stock at an average price of $58.82 per share for a total cost of $7.9 million. As of September 30, 2018, the Company had $77.7 million available for future purchases under the stock repurchase program.