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Guarantees (Changes in Liability of Estimated Loss from Credit Recourse Agreement) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Movement In Guaranteed Benefit Liability Gross [Roll Forward]      
Balance at beginning of period $ 985 $ 346 $ 358
Additions from Scotiabank PR & USBI Acquisition 0 710 0
Net (charge-off/terminations) recoveries (767) (71) (12)
Balance at the end of period $ 218 $ 985 $ 346