Loans and Allowance for Loan Losses (Details 3) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Mar. 31, 2011
Troubled Debt Restructurings:
Number of Contracts	34	18
Pre-Modification Outstanding Recorded Investment	$ 23,649	$ 22,036
Post-Modification Outstanding Recorded Investment	19,926	19,757
Commercial Loans [Member]
Troubled Debt Restructurings:
Number of Contracts	30	15
Pre-Modification Outstanding Recorded Investment	21,770	20,694
Post-Modification Outstanding Recorded Investment	18,165	18,431
Residential mortgage Loans [Member]
Troubled Debt Restructurings:
Number of Contracts	4	3
Pre-Modification Outstanding Recorded Investment	1,879	1,342
Post-Modification Outstanding Recorded Investment	$ 1,761	$ 1,326