Fair Value Measurements Schedule of Fair Value Level 3 Assets (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands		12 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Mortgage Backed Securities, Other [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		$ 45	$ 47	$ 49
Fair Value, Measurement with Unobservable Inputs, Recurring Basis, Asset, Gain (Loss) Included in Earnings	[1]	0	0
Fair Value, Measurement with Unobservable Inputs, Recurring Basis, Asset, Issuances, (Settlements)		(2)	(2)
Fair Value, Measurement with Unobservable Inputs, Recurring Basis, Asset, Transfers, Net		0	0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0	0
Other Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		201	210	$ 265
Fair Value, Measurement with Unobservable Inputs, Recurring Basis, Asset, Gain (Loss) Included in Earnings	[1]	(9)	(55)
Fair Value, Measurement with Unobservable Inputs, Recurring Basis, Asset, Issuances, (Settlements)		0	0
Fair Value, Measurement with Unobservable Inputs, Recurring Basis, Asset, Transfers, Net		0	0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		$ (8)	$ (51)

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