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Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	13. Subsequent Events Share Repurchase Program From April 1, 2017 to May 2, 2017, we repurchased 3.0 million shares of our Class A common stock under the 2016 Share Repurchase Program at a weighted average price of $2.79 per share for a total of $8.4 million.