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CREDIT AGREEMENT (Details) (USD $)
0 Months Ended 6 Months Ended
Jan. 27, 2014
May 09, 2011
Sep. 30, 2014
Mar. 31, 2014
Jan. 27, 2014
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%