Short-Term Borrowings and Long-Term Debt Reverse Treasury Rate Lock (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2015	Jun. 23, 2014
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	$ 638
Treasury Lock [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount		$ 650,000