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Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events From July 1, 2017 through August 3, 2017, the Company purchased 1,279,206 shares of its common stock at an average price per share of $32.03, and a total cost of approximately $41 million. As of August 3, 2017 the Company had approximately $341 million of share repurchase authorization remaining.