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Condensed Consolidating Financial Information - Narrative (Details)
Mar. 31, 2015
Condensed Financial Statements, Captions [Line Items]  
Equity method investment, ownership percentage 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
Parent Company  
Condensed Financial Statements, Captions [Line Items]  
Equity method investment, ownership percentage 100.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ParentCompanyMember