CREDIT AGREEMENT (Details) (USD $)	1 Months Ended		3 Months Ended	6 Months Ended
	Aug. 31, 2012	May 31, 2011	Sep. 30, 2012	Sep. 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	$ 100,000,000
Potential Increase to Borrowing Capacity			100,000,000	100,000,000
Total Facility Size, Including Potential Increase to Borrowing Capacity			200,000,000	200,000,000
Outstanding Borrowings Under The Line Of Credit			29,000,000	29,000,000	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%	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%	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%	1.10%