Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Amounts Related to Sale-Leaseback (Details)

v3.8.0.1
Summary of Significant Accounting Policies - Amounts Related to Sale-Leaseback (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Sale Leaseback Transaction [Line Items]      
Capital lease assets, net $ 5,817 $ 5,303  
Assets Held under Capital Leases      
Sale Leaseback Transaction [Line Items]      
Capital lease assets, net 37,034 36,676  
Solar Photovoltaic Projects      
Sale Leaseback Transaction [Line Items]      
Deferred loss, short-term, net 115 118  
Deferred loss, long-term, net 2,004 2,054  
Total deferred loss 2,119 2,172 $ 913
Capital lease liabilities, short-term 4,359 4,157  
Capital lease liabilities, long-term 31,400 30,712  
Total capital lease liabilities 35,759 34,869  
Deferred gain, short-term, net 328 338  
Deferred gain, long-term, net 5,728 5,835  
Total deferred gain $ 6,056 $ 6,173 $ 273