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Commitments and Contingencies (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2015
USD ($)
Contracts
Commitments and Contingencies Disclosure [Abstract]  
Development Contracts with Third Parties, Number | Contracts 0
credit facility 2015 [Member] | Line of Credit [Member]  
Other Commitments [Line Items]  
Letters of Credit Outstanding, Amount | $ $ 15,474