LETTERS OF CREDIT (Details) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Credit facilities
Long-term restricted cash, as determined by the expiration date of the underlying letters of credit	$ 899,000	$ 4,183,000
Standby letters of credit
Credit facilities
Outstanding Amount	25,437,000
Restricted cash balance	13,517,000
Long-term restricted cash, as determined by the expiration date of the underlying letters of credit	$ 899,000
Standby letters of credit | Minimum
Credit facilities
Percentage of outstanding amount that is cash secured	52.00%
Standby letters of credit | Maximum
Credit facilities
Percentage of outstanding amount that is cash secured	66.00%