Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Details)

v3.5.0.2
Long-Term Debt (Details)
3 Months Ended
Jun. 30, 2016
USD ($)
Mar. 31, 2016
USD ($)
Apr. 30, 2013
USD ($)
Debt Instrument [Line Items]      
Less current portion $ (15,188,000) $ (13,500,000)  
Long-term debt, noncurrent 75,144,000 80,112,000  
Debt issuance costs, net $ 793,000 888,000  
Secured Debt      
Debt Instrument [Line Items]      
Debt Instrument, face amount     $ 135,000,000
Senior Notes      
Debt Instrument [Line Items]      
Debt Instrument, interest rate, stated percentage 2.50%    
Loans Payable      
Debt Instrument [Line Items]      
Debt Instrument, face amount $ 5,905,000    
Variable Rate Term Loan, due April 2019, net of deferred debt issuance costs of $793 and $888 as of June 30, 2016 and March 31, 2016, respectively $ 90,332,000 93,612,000  
Debt Instrument, interest rate, stated percentage 2.50%    
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%    
Annual commitment fee on unutilized commitments (as a percent) 0.30%    
Line of credit facility, commitment fee percentage 0.125%    
Outstanding borrowings $ 0    
Capacity available under credit facility $ 59,022,000    
Interest rate at period end (as a percent) 2.50%    
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    
Interest Rate Swap | Revolving credit facility      
Debt Instrument [Line Items]      
Derivative, fixed interest rate 3.18%    
Interest payments, percent hedged 100.00%    
Revolving credit facility      
Debt Instrument [Line Items]      
Outstanding borrowings $ 0 $ 0  
Revolving credit facility | Line of Credit      
Debt Instrument [Line Items]      
Debt Instrument, face amount     $ 60,000,000