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Equity Method Investments (Details) - USD ($)
$ in Thousands
12 Months Ended
Jul. 25, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]        
Ownership 17.00%      
Payments to acquire $ 46,700 $ 46,745 $ 0 $ 0
Equity method investment   $ 45,061 $ 0