Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Leases (Details)

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Summary of Significant Accounting Policies - Leases (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Jan. 01, 2019
Lessee, Lease, Description [Line Items]      
Operating lease assets [1] $ 39,151 $ 32,791  
Current portion of operating lease liabilities [1] 6,106 5,802  
Long-term operating lease liabilities, net of current portion [1] $ 35,300 $ 29,101  
Accounting Standards Update 2016-02      
Lessee, Lease, Description [Line Items]      
Operating lease assets     $ 31,639
Current portion of operating lease liabilities     5,084
Long-term operating lease liabilities, net of current portion     $ 28,480
[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) of $162,198 as of December 31, 2020 and $158,912 as of December 31, 2019. Includes non-recourse liabilities of consolidated VIEs of $33,335 as of December 31, 2020 and $38,568 as of December 31, 2019. See Note 11.