Commitments and Contingencies - Debt (Details)	9 Months Ended
	Sep. 30, 2015
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	33.00%
Debt Securities | Minimum
Change of control provisions in debt covenants
Debt instrument covenant, minimum percentage of ownership by a person	50.00%