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Fair Value of Financial Instruments (Reconciliation of Assets and Liabilities Using Significant Unobservable Inputs (Level 3)) (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
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 $ 9,821,000
New instruments acquired 2,394,000 41,637,000 1,481,000
Principal repayments (4,067,000) (906,000) (814,000)
Changes in fair value of servicing assets (1,811,000) (668,000) 228,000
Balance at end of period $ 47,295,000 $ 50,779,000 $ 10,716,000