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Financing Receivables - Components of Lease Receivables (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Financing Receivable, Past Due [Line Items]      
Less: allowance for credit losses $ (722) $ (1,489) $ (2,971)
Long-term financing arrangements, net 13,719 22,298  
Long-Term Financing Arrangement      
Financing Receivable, Past Due [Line Items]      
Long-term financing arrangements, gross 15,659 24,082  
Less: allowance for credit losses (716) (1,390)  
Less: unearned income (1,339) (2,268)  
Long-term financing arrangements, net $ 13,604 $ 20,424