CREDIT AGREEMENT (Details) (USD $)	1 Months Ended		3 Months Ended
	Aug. 31, 2012	May 31, 2011	Jun. 30, 2012	Mar. 31, 2012
Line of Credit Facility [Line Items]
Line of Credit Facility, Initiation Date		May 09, 2011
Line of Credit Facility, Latest Amendment Date	August 2012
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
Outstanding Borrowings Under The Line Of Credit			42,000,000	37,000,000
One Month Term			1 month
Three Month Term			3 months
Six Month Term			6 months
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.20%
Line of Credit Facility, Expiration Date			May 09, 2015
Minimum Required Liquid Funds			$ 200,000,000
Line Of Credit Facility Interest Rate Spread Below The Banks Announced Prime Rate [Member]
Line of Credit Facility [Line Items]
Loans Under The Credit Agreement, Basis Spread on Variable Rate			1.50%
Line Of Credit Facility Interest Rate Spread Above A Daily One Month LIBOR Rate [Member]
Line of Credit Facility [Line Items]
Loans Under The Credit Agreement, Basis Spread on Variable Rate			1.10%
Line Of Credit Facility Interest Rate Spread Above Adjusted LIBOR Rate For A Term Of One Three Or Six Months [Member]
Line of Credit Facility [Line Items]
Loans Under The Credit Agreement, Basis Spread on Variable Rate			1.10%