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Loans and Finance Receivables and Allowance for Credit Losses (Non-delinquent, Paying and Non-paying Delinquent Loans) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Receivables [Abstract]    
Current loans and finance receivables $ 1,098,064 $ 1,031,449
Delinquent: paying (accrual status) 38,514 54,427
Delinquent: non-paying (non-accrual status) 101,831 59,078
Total unpaid principal balance $ 1,238,409 $ 1,144,954