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Equity and Noncontrolling Interest - Narrative (Details)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Cost of Sales [Member]    
Concentration Risk [Line Items]    
Reclassification Percentage 30.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
30.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
Operating Expense [Member]    
Concentration Risk [Line Items]    
Reclassification Percentage 70.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
70.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember