Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Retained earnings which is available to distribute in the form of cash dividends to the Holding Company	$ 10.7
Purchase of treasury shares (in shares)	142,405	40,000
Treasury Stock Acquired, Average Cost Per Share	$ 16.45	$ 19.28
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	284,806
Savings Bank [Member]
Liquidation Account, Conversion From Mutual to Stock Form	$ 0.4	$ 0.5