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Line of Credit (Details) - USD ($)
3 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Mar. 31, 2016
Jan. 04, 2016
Line of Credit Facility [Line Items]        
Loans outstanding $ 88,000,000   $ 105,000,000  
Remaining borrowing capacity 162,000,000      
Interest expense 740,000      
Amortization of debt issuance costs $ 269,000 $ 0    
Line of Credit [Member]        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity       $ 250,000
Letter of Credit [Member]        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity       10,000
Swing-Line Loans [Member]        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity       $ 10,000