Line of Credit (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2012 Loans
Line of Credit (Textual) [Abstract]
Credit facility with borrowing capacity	$ 10
Debt Instrument, Basis Spread on Variable Rate	1.50%
Letters of credit in aggregate amount	$ 8.0
Current and liabilities	1.25
Debt to tangible net worth	1.25
Fluctuating Rate Determined By The Financial Institution	Fluctuating rate determined by the financial institution to be 1.50% above the daily one-month LIBOR rate
Debt to tangible net worth not greater than	Debt to tangible net worth not greater than 1.25:1
Number of outstanding revolving loans at any time during fiscal 2012 or the quarter ended June 30	0