Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Retained earnings which is available to distribute in the form of cash dividends to the Holding Company	$ 29.7
Purchase of treasury shares (in shares)	786,498	1,253,725
Treasury stock acquired, average cost per share	$ 14.59	$ 21.73
Stock repurchase program, remaining number of shares authorized to be repurchased	807,964
Savings Bank
Liquidation account, conversion from mutual to stock form	$ 0.3	$ 0.3