Stockholders' Equity and Regulatory Matters (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2016
Stockholders' Equity and Regulatory Matters [Abstract]
Preferred stock, authorized	500,000	500,000
Preferred stock, no par value	$ 0	$ 0
Preferred Stock, Issued	0	0
Shares available for issuance under Dividend Reinvestment Plan	141,887
Shares repurchase program, number of shares authorized to be repurchased			200,000
Shares repurchase program, number of shares repurchased	87,712	21,508
Forfeiture of restricted stock, Shares	565	800
Shares repurchase program, number of shares remaining	44,617
Undistributed Earnings of Subsidiary, Available for Distribution	$ 35,775