Fair Value Measurements Fair Value on a Non-recurring basis (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Mar. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	$ 9,709	$ 13,107
Impaired Loans with Specific Reserve Allocated	10,443	13,397
Other Real Estate, Foreclosed Assets, and Repossessed Assets	946	2,386
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	0	0
Impaired Loans with Specific Reserve Allocated	0	0
Other Real Estate, Foreclosed Assets, and Repossessed Assets	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	9,709	13,107	13,107
Impaired Loans with Specific Reserve Allocated	0	0
Other Real Estate, Foreclosed Assets, and Repossessed Assets	946	2,386
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	0	0
Impaired Loans with Specific Reserve Allocated	10,443	13,397
Other Real Estate, Foreclosed Assets, and Repossessed Assets	$ 0	$ 0