Quarterly report pursuant to Section 13 or 15(d)

Variable Interest Entities (Details)

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Variable Interest Entities (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Variable Interest Entity [Line Items]        
Net income (loss) $ 8,991,000 $ 59,000 $ 781,000 $ 831,000
Variable Interest Entity [Member]        
Variable Interest Entity [Line Items]        
Variable Interest Entity, Maximum Loss Exposure, Amount 5,847,000   5,847,000  
Operating lease liability, current $ 3,306,000   $ 3,306,000  
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Other liabilities   Other liabilities  
Revenue from Contract with Customer, Excluding Assessed Tax   831,000   1,696,000
Net income (loss)   $ (3,000)   $ 22,000