Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Details)

v3.3.0.814
Long-Term Debt (Details)
3 Months Ended 6 Months Ended
Sep. 30, 2015
USD ($)
Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Mar. 31, 2015
USD ($)
Debt Instrument [Line Items]        
Less current portion $ (13,500,000) $ (13,500,000)   $ (13,500,000)
Long-term debt, noncurrent 87,750,000 87,750,000   94,500,000
Outstanding borrowings 5,000,000 $ 5,000,000   0
Issuance costs associated with revolving line of credit and long term debt $ 341,000   $ 290,000  
Senior Notes [Member]        
Debt Instrument [Line Items]        
Debt Instrument, interest rate, stated percentage 2.00% 2.00%    
Loans Payable        
Debt Instrument [Line Items]        
Variable Rate Term Loan, due April 2019 $ 101,250,000 $ 101,250,000   $ 108,000,000
Debt Instrument, interest rate, stated percentage 2.00% 2.00%    
Revolving credit facility        
Debt Instrument [Line Items]        
Debt instrument, interest rate, decrease (percentage) 0.25%      
Line of credit facility, decrease in periodic payment (as a percentage) 0.05% 0.05%    
Annual commitment fee on unutilized commitments (as a percent) 0.25%      
Line of credit facility, commitment fee percentage 0.125%      
Outstanding borrowings $ 5,000,000 $ 5,000,000    
Capacity available under credit facility $ 54,371,000 $ 54,371,000    
Interest rate at period end (as a percent) 2.00% 2.00%    
London Interbank Offered Rate (LIBOR)        
Debt Instrument [Line Items]        
Interest rate in addition to LIBOR rate 1.00%      
Canadian Deposit Offer Rate        
Debt Instrument [Line Items]        
Interest rate in addition to LIBOR rate 1.00%      
Minimum | Base Rate        
Debt Instrument [Line Items]        
Interest rate in addition to LIBOR rate 0.50%      
Maximum        
Debt Instrument [Line Items]        
Maximum leverage ratio   2.75    
Maximum | Base Rate        
Debt Instrument [Line Items]        
Interest rate in addition to LIBOR rate 1.00%      
Through March 31, 2017 | Loans Payable        
Debt Instrument [Line Items]        
Repayments of Notes Payable $ 1,125,000      
Last Two Years Of Loan | Loans Payable        
Debt Instrument [Line Items]        
Repayments of Notes Payable   $ 1,688,000    
Due in April 2019 | Loans Payable        
Debt Instrument [Line Items]        
Repayments of Notes Payable $ 40,500,000