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Fair Value Measurements and Disclosures Notes Receivable (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Oct. 14, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Paid-in-kind interest income $ (1,112,000)us-gaap_PaidInKindInterest $ 0us-gaap_PaidInKindInterest    
Notes Receivable        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Principal Outstanding 40,501,000us-gaap_NotesAndLoansReceivableNetNoncurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_NotesReceivableMember
  39,707,000us-gaap_NotesAndLoansReceivableNetNoncurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_NotesReceivableMember
39,000,000us-gaap_NotesAndLoansReceivableNetNoncurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_NotesReceivableMember
Paid-in-kind interest income 794,000us-gaap_PaidInKindInterest
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_NotesReceivableMember
     
Note receivable interest income     $ 1,100,000us-gaap_OtherInterestAndDividendIncome
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_NotesReceivableMember