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Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Dividend Declaration In October 2018, the Company’s Board of Directors declared a quarterly cash dividend of $0.22 per share, estimated to be $10.0 million in total. The dividend will be payable on January 24, 2019, to stockholders of record on January 3, 2019. Share Repurchases From October 1, 2018 to October 29, 2018, the Company repurchased an additional 528,100 shares of the Company’s common stock in the open market at an average price of $68.26 per share, for a total of $36.0 million. As a result, as of October 29, 2018, approximately $65.4 million remained available for share repurchase through December 31, 2018 under the Company’s previously announced $275.0 million share repurchase authorization.