Allowance For Loan Losses And Impaired Assets (Schedule Of Risk Rating Grade Of The Loan Portfolio Broken-Out By Type) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 564,294	$ 556,857
Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	371,670	353,117
Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	8,162	9,252
Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	22,496	25,983
Not Formally Rated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	161,966	168,505
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	121,216	125,636
Residential Real Estate [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	4,700	4,285
Residential Real Estate [Member] | Not Formally Rated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	116,516	121,351
Residential Real Estate: Home Equity Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	36,078	37,724
Residential Real Estate: Home Equity Loans [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	219	310
Residential Real Estate: Home Equity Loans [Member] | Not Formally Rated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	35,859	37,414
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	299,366	289,057
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	281,999	266,757
Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	6,681	7,896
Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	10,686	14,404
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	9,639	9,772
Consumer Loans [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	48	32
Consumer Loans [Member] | Not Formally Rated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	9,591	9,740
Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	97,995	94,668
Commercial Loans [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	89,671	86,360
Commercial Loans [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,481	1,356
Commercial Loans [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 6,843	$ 6,952