Quarterly report pursuant to Section 13 or 15(d)

Variable Interest Entities (Narrative) (Details)

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Variable Interest Entities (Narrative) (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Variable Interest Entity [Line Items]    
Restricted cash $ 791 $ 938
Primary Beneficiary    
Variable Interest Entity [Line Items]    
Tax credit percentage 39.00%  
Restricted cash $ 800  
Percentage of recapture 100.00%  
Recapture period 7 years  
Assets $ 89,000  
Liabilities $ 63,000