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Equity and Noncontrolling Interest - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Equity Class Of Treasury Stock [Line Items]        
Shares Repurchased And Retired During Period     0 83,879
Payments For Repurchase Of Common Stock     $ 0 $ 5,859
2015 Share Repurchase Program [Member]        
Equity Class Of Treasury Stock [Line Items]        
Share Repurchase Program Authorized Amount $ 100,000 $ 100,000 $ 100,000 $ 100,000
Cost of Goods Sold [Member]        
Concentration Risk [Line Items]        
Reclassification Percentage 25.00% 25.00% 25.00% 25.00%
Operating Expenses [Member]        
Concentration Risk [Line Items]        
Reclassification Percentage 75.00% 75.00% 75.00% 75.00%