Loans (Troubled Debt Restructurings That Subsequently Defaulted) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013 contract	Mar. 31, 2012
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings that Subsequently Defaulted, Number of Contracts	2
Troubled Debt Restructurings that Subsequently Defaulted, Recorded Investment		$ 356
Commercial [Member] | Asset Quality Rating - Substandard [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings that Subsequently Defaulted, Number of Contracts	1
Troubled Debt Restructurings that Subsequently Defaulted, Recorded Investment		138
Commercial [Member] | Asset Quality Rating - Doubtful [Member]
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings that Subsequently Defaulted, Number of Contracts	1
Troubled Debt Restructurings that Subsequently Defaulted, Recorded Investment		$ 218