Indebtedness (Money Market Loans Narrative) (Details) (USD $)	12 Months Ended
	Mar. 31, 2014
Agreement Expiring In December 2014 [Member]
Debt Instrument [Line Items]
Money market loans maximum amount allowed	$ 35,000,000
Money market advances agreement expiration	December 30, 2014
Money market loans, terms	advances may be for one to six months with rates at a fixed spread over the corresponding London Interbank Offering Rate (“LIBOR”)
Short-term advances outstanding	0
Agreement Expiring In July 2014 [Member]
Debt Instrument [Line Items]
Money market loans maximum amount allowed	35,000,000
Money market advances agreement expiration	July 31, 2014
Money market loans, terms	advances are generally overnight or for up to seven days. The amount, term and interest rate of an advance are established through mutual agreement with the financial institution when the Company requests such an advance
Short-term advances outstanding	$ 0
Maximum [Member] | Agreement Expiring In December 2014 [Member]
Debt Instrument [Line Items]
Short term debt maturity period	6 months
Maximum [Member] | Agreement Expiring In July 2014 [Member]
Debt Instrument [Line Items]
Short term debt maturity period	7 days
Minimum [Member] | Agreement Expiring In December 2014 [Member]
Debt Instrument [Line Items]
Short term debt maturity period	1 month