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Redeemable Noncontrolling Interest (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Redeemable Noncontrolling Interest [Roll Forward]    
Redeemable noncontrolling interest, beginning of period $ 2,287 $ 2,665
Net loss attributable to redeemable noncontrolling interest (11) (8)
Other comprehensive income attributable to redeemable noncontrolling interest 148 112
Redeemable noncontrolling interest, end of period $ 2,424 $ 2,769