Money market loans maximum amount allowed

$ 35,000,000

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

advances may be for one to six months with rates at a fixed spread over the corresponding London Interbank Offering Rate (“LIBOR”)

Short-term debt

$ 0

Indebtedness (Money Market Loans Narrative) (Details) (USD $)			6 Months Ended
	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2013 Agreement Expiring In July 2014 [Member]	Sep. 30, 2013 Agreement Expiring In January 2014 [Member]	Sep. 30, 2013 Maximum [Member] Agreement Expiring In July 2014 [Member]	Sep. 30, 2013 Maximum [Member] Agreement Expiring In January 2014 [Member]	Sep. 30, 2013 Minimum [Member] Agreement Expiring In January 2014 [Member]
Debt Instrument [Line Items]
Money market loans maximum amount allowed			$ 35,000,000	$ 35,000,000
Money market advances agreement expiration			July 31, 2014	January 1, 2014
Short-term debt, 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	advances may be for one to six months with rates at a fixed spread over the corresponding London Interbank Offering Rate (“LIBOR”)
Short term debt maturity period					7 days	6 months	1 month
Short-term debt	$ 0	$ 0	$ 0	$ 0