Commitments and Contingent Liabilities - Narrative (Details) - Settled Litigation - Class Action Lawsuit, United Stated District Court for Southern District of New York - Subsequent Event	Jan. 25, 2021 USD ($)
Guarantor Obligations [Line Items]
Litigation settlement, amount Awarded to other party for attorneys'' fees and expenses	$ 500,000
Litigation settlement, additional incremental corporate governance enhancements, risk and compliance controls and infrastructure	$ 2,000,000
Additional advanced corporate governance enhancement period (in years)	3 years