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Significant Accounting Policies (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Nov. 30, 2016
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Variable Interest Entity, Primary Beneficiary [Member]      
Significant Accounting Policies [Line Items]      
Consolidated Assets   $ 126,078 $ 116,958
Consolidated Liabilities   $ 102,487 $ 90,260
LP Units [Member]      
Significant Accounting Policies [Line Items]      
Limited Partnership Units Convertible Conversion Ratio 1 1  
Minimum [Member]      
Significant Accounting Policies [Line Items]      
Property, Plant and Equipment, Useful Life   3 years  
Award Vesting Period   1 year  
Maximum [Member]      
Significant Accounting Policies [Line Items]      
Property, Plant and Equipment, Useful Life   5 years  
Award Vesting Period   5 years