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Restrictions On Dividends, Loans, and Advances (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)
Disclosure Of Restrictions On Dividends Loans And Advances Disclosure [Abstract]
Number of years used for undistributed net income of the Bank	3 years
Retained earnings available for the payment of dividends	$ 17.7
Restricted net assets	83.4
Funds available for loans or advances	$ 10.5