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Troubled Debt Restructurings (Schedule of Troubled Debt Restructurings on Financing Receivables) (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
USD ($)
contract
Dec. 31, 2018
USD ($)
contract
Dec. 31, 2017
USD ($)
contract
Troubled Debt Restructuring, Subsequent Periods [Line Items]      
Number of Contracts | contract 0 1 1
Pre-Modification Outstanding Recorded Investment $ 0 $ 86 $ 22
Post-Modification Outstanding Recorded Investment $ 0 $ 86 $ 22
Consumer Installment [Member]      
Troubled Debt Restructuring, Subsequent Periods [Line Items]      
Number of Contracts | contract     1
Pre-Modification Outstanding Recorded Investment     $ 22
Post-Modification Outstanding Recorded Investment     $ 22
Residential Single Family [Member]      
Troubled Debt Restructuring, Subsequent Periods [Line Items]      
Number of Contracts | contract   1  
Pre-Modification Outstanding Recorded Investment   $ 86  
Post-Modification Outstanding Recorded Investment   $ 86