Fair Value Measurements Assets within Level 3 of Valuation Hierarchy (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	$ 87,200
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	51	52
Available-for-sale Securities, Gross Unrealized Gain (Loss)	0	(1)
Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities	(2)	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0	0
Available-for-sale Securities	49	51
Servicing Asset at Fair Value, Amount	275	491
Mortgage Servicing unrealized loss	1	(26)	[1]
Payments for (Proceeds from) Mortgage Servicing Rights	0	0
Servicing Asset at Fair Value, Amount	276	465
Change in unrealized gains and losses to instruments held	$ 0	$ 0

[1] (1) Includes net servicing cash flows and the passage of time.