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Commitments and Contingencies - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]    
Guarantees extend term period (years) 1 year  
Allowance for estimated losses on commitments $ 756 $ 523
Agreements term (years) 3 years