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Commitments and Contingencies - Debt (Details)
3 Months Ended
Mar. 31, 2016
Change of control provisions in debt covenants  
Number of months considered to determine requirement of prepayment of debts 24 months
Line of Credit | Minimum  
Change of control provisions in debt covenants  
Debt instrument covenant, minimum percentage of ownership by a person 50.00%
Debt Securities | Minimum  
Change of control provisions in debt covenants  
Debt instrument covenant, minimum percentage of ownership by a person 50.00%