Loans (Summary Of The Balances Of Loans) (Details) (USD $)	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2011	Mar. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 564,294,000	$ 556,857,000
Allowance for loan losses	(5,815,000)	(5,697,000)	(5,597,000)	(5,686,000)
Net deferred loan fees	1,083,000	1,086,000
Loans, net	559,562,000	552,246,000
Loans serviced	13,500,000	13,300,000
Residential Real Estate: 1-4 Family [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	121,216,000	125,636,000
Allowance for loan losses	(817,000)	(789,000)	(575,000)	(738,000)
Residential Real Estate: Home Equity Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	36,078,000	37,724,000
Allowance for loan losses	(143,000)	(127,000)	(158,000)	(154,000)
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	299,366,000	289,057,000
Allowance for loan losses	(2,564,000)	(2,794,000)	(1,969,000)	(1,981,000)
Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	9,639,000	9,772,000
Allowance for loan losses	(59,000)	(64,000)	(93,000)	(99,000)
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	97,995,000	94,668,000
Allowance for loan losses	$ (2,232,000)	$ (1,923,000)	$ (2,802,000)	$ (2,714,000)