Other-Than-Temporary Impairment Losses (Summary Of Gross Unrealized Losses And Fair Value, Aggregated By Investment Category And Length Of Time) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Less than 12 Months, Fair Value	$ 15,890	$ 20,900
Securities Available For Sale, 12 Months or Longer, Fair Value	2,639	3,105
Securities Available For Sale, Fair Value, Total	18,529	24,005
Securities Available For Sale, Less than 12 Months, Unrealized Losses	223	375
Securities Available For Sale, 12 Months or Longer, Unrealized Losses	124	206
Securities Available For Sale, Unrealized Losses, Total	347	581
Temporarily Impaired Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Less than 12 Months, Fair Value	15,890	20,900
Securities Available For Sale, 12 Months or Longer, Fair Value	2,126	2,733
Securities Available For Sale, Fair Value, Total	18,016	23,633
Securities Available For Sale, Less than 12 Months, Unrealized Losses	223	375
Securities Available For Sale, 12 Months or Longer, Unrealized Losses	47	124
Securities Available For Sale, Unrealized Losses, Total	270	499
Debt Securities Issued By The States Of The United States And Political Subdivisions Of The States
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Less than 12 Months, Fair Value	9,024	3,212
Securities Available For Sale, 12 Months or Longer, Fair Value	1,517
Securities Available For Sale, Fair Value, Total	10,541	3,212
Securities Available For Sale, Less than 12 Months, Unrealized Losses	165	37
Securities Available For Sale, 12 Months or Longer, Unrealized Losses	24
Securities Available For Sale, Unrealized Losses, Total	189	37
Debt Securities Issued By The U.S. Treasury And Other U.S. Government Corporations And Agencies
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Less than 12 Months, Fair Value		11,219
Securities Available For Sale, 12 Months or Longer, Fair Value		1,502
Securities Available For Sale, Fair Value, Total		12,721
Securities Available For Sale, Less than 12 Months, Unrealized Losses		240
Securities Available For Sale, 12 Months or Longer, Unrealized Losses		51
Securities Available For Sale, Unrealized Losses, Total		291
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, Less than 12 Months, Fair Value	6,866	6,469
Securities Available For Sale, 12 Months or Longer, Fair Value	609	1,231
Securities Available For Sale, Fair Value, Total	7,475	7,700
Securities Available For Sale, Less than 12 Months, Unrealized Losses	58	98
Securities Available For Sale, 12 Months or Longer, Unrealized Losses	23	73
Securities Available For Sale, Unrealized Losses, Total	81	171
Mortgage-Backed Securities [Member] | Other-Than-Temporarily Impaired Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities Available For Sale, 12 Months or Longer, Fair Value	513	372
Securities Available For Sale, Fair Value, Total	513	372
Securities Available For Sale, 12 Months or Longer, Unrealized Losses	77	82
Securities Available For Sale, Unrealized Losses, Total	$ 77	$ 82