CREDIT AGREEMENT (Details) (USD $)	3 Months Ended
	Jun. 30, 2011
Line of Credit Facility [Line Items]
Line of Credit Facility, Initiation Date	May 2011
Line of Credit Facility, Maximum Borrowing Capacity	$ 100,000,000
Potential Increase to Borrowing Capacity	100,000,000
Total Facility Size, Including Potential Increase to Borrowing Capacity	200,000,000
Line of Credit Facility Interest Rate Spread Below Bank Prime Rate	1.50%
Line of Credit Facility Interest Rate Spread Above Daily One Month LIBOR	1.10%
Line of Credit Facility Interest Rate Spread Above Adjusted LIBOR	1.10%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.20%
Line of Credit Facility, Amount Outstanding	0
Line of Credit Facility, Expiration Date	May 9, 2014
Minimum Required Liquid Funds	$ 200,000,000