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Fair Value of Financial Instruments (Reconciliation of assets and liabilities using significant unobservable inputs (Level 3)) (Details) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Changes in fair value of servicing assets $ 0 $ 0
Fair Value, Measurements, Recurring [Member] | Servicing Assets [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning period 50,779,000 10,716,000
New instruments acquired 456,000 302,000
Change due to principal payments (767,000) (201,000)
Changes in fair value of servicing assets (1,181,000) (194,000)
Balance at end of period $ 49,287,000 $ 10,623,000