Loans, Troubled Debt Restructuring (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013 Contract	Mar. 31, 2012 Contract
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings, # of Contracts	3	2
Troubled Debt Restructurings, Pre-Modification	$ 1,108	$ 284
Troubled Debt Restructurings, Post-Modification	1,082	281
Troubled Debt Restructurings That Subsequently Defaulted, # of Contracts	0	2
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment	0	114
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings, # of Contracts	1	1
Troubled Debt Restructurings, Pre-Modification	84	57
Troubled Debt Restructurings, Post-Modification	81	57
Commercial Construction [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings That Subsequently Defaulted, # of Contracts	0	1
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment	0	64
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings, # of Contracts	2	1
Troubled Debt Restructurings, Pre-Modification	1,024	227
Troubled Debt Restructurings, Post-Modification	1,001	224
Troubled Debt Restructurings That Subsequently Defaulted, # of Contracts	0	1
Troubled Debt Restructurings That Subsequently Defaulted, Recorded Investment	$ 0	$ 50