Fair Value Measurements Fair Value on a Non-recurring basis (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Mar. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans with Specific Reserve Allocated	$ 11,956	$ 17,784
Loans Held-for-sale, Fair Value Disclosure	26,830	29,626
Loans and Leases Receivable, Gross, Carrying Amount	381,756	414,830
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans with Specific Reserve Allocated	0	0
Loans Receivable, Fair Value Disclosure	0	0
Loans Held-for-sale, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans with Specific Reserve Allocated	0	0
Loans Receivable, Fair Value Disclosure	0	398,258
Loans Held-for-sale, Fair Value Disclosure		29,626
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans with Specific Reserve Allocated		17,784
Loans Receivable, Fair Value Disclosure	11,956	0
Loans Held-for-sale, Fair Value Disclosure	$ 0	$ 0