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Fair Value Measurement and Fair Value of Financial Instruments (Reconciliation of Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Equity warrants | Lending fees      
Reconciliation of the beginning and ending balances for major asset categories measured at fair value on a recurring basis using significant unobservable inputs (Level 3)      
Total unrealized (losses) gains for the period included in earnings $ (292) $ 225 $ 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity warrants      
Reconciliation of the beginning and ending balances for major asset categories measured at fair value on a recurring basis using significant unobservable inputs (Level 3)      
Beginning balance 673 679 0
Transfer of investment security from held-to-maturity to AFS 0 0 0
Total gains included in earnings 563 162 0
Issuances 114 65 679
Sales 0 0 0
Settlements (929) (233) 0
Ending balance $ 421 673 679
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Other Securities      
Reconciliation of the beginning and ending balances for major asset categories measured at fair value on a recurring basis using significant unobservable inputs (Level 3)      
Beginning balance   $ 0 0
Transfer of investment security from held-to-maturity to AFS     115,615
Total gains included in earnings     1,156
Issuances     0
Sales     (116,771)
Settlements     0
Ending balance     $ 0