CREDIT AGREEMENT (Details) (USD $)	1 Months Ended	9 Months Ended
	May 31, 2011	Dec. 31, 2013	Jan. 27, 2014	May 03, 2013	Mar. 31, 2013
Line of Credit Facility [Line Items]
Initiation date of credit agreement	May 09, 2011
Latest amendment date of Credit Agreement			January 27, 2014
Credit facility expiration date		May 09, 2017
Unsecured revolving line of credit				$ 100,000,000
Amount of potential increase for commitment				100,000,000
Total facility size				200,000,000
Outstanding borrowings under line of credit		0			0
One month term		1 month
Three month term		3 months
Six month term		6 months
Commitment fee percentage		0.20%
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]
Spread for interest rate		1.50%
Line Of Credit Facility Interest Rate Spread Above A Daily One Month LIBOR Rate [Member]
Line of Credit Facility [Line Items]
Spread for interest 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]
Spread for interest rate		1.10%