Annual report pursuant to Section 13 and 15(d)

Debt (Details)

v3.3.0.814
Debt (Details)
$ in Thousands, CAD in Millions
 12 Months Ended
Sep. 30, 2015
USD ($)
Sep. 30, 2015
CAD
item
Sep. 30, 2015
USD ($)
item
Apr. 01, 2015
USD ($)
Mar. 09, 2015
USD ($)
Debt.          
Interest expense $ 1,398        
Capital leases          
Capital lease obligations     $ 400    
Assets recorded under capital lease     500    
Accumulated amortization     200    
Future minimum lease payments          
future minimum lease payments     200    
Maximum          
Debt.          
Derivative liability     100    
Maximum | Accounts payable and Accrued liabilities          
Debt.          
Derivative liability     $ 100    
Credit Agreement          
Debt.          
Maximum borrowing capacity         $ 400,000
Amount borrowed       $ 225,000  
Number of letters of credit issued | item   3 3    
Accrued interest rate (as a percent)   1.19% 1.19%    
Fixed payment of principal balance     $ 53,300    
Interest Paid $ 1,200        
Credit Agreement | U.S Dollar Borrowings          
Debt.          
Borrowings     202,000    
Credit Agreement | Canadian Dollar Borrowings          
Debt.          
Borrowings   CAD 10.3 7,700    
Credit Agreement | Minimum          
Debt.          
Leverage ratio 2.5        
Credit Agreement | Minimum | Base Rate          
Debt.          
Margin (as a percent) 0.00%        
Credit Agreement | Minimum | Eurocurrency Rate          
Debt.          
Margin (as a percent) 1.00%        
Credit Agreement | Minimum | Index Rate          
Debt.          
Margin (as a percent) 1.00%        
Credit Agreement | Maximum          
Debt.          
Total leverage ratio 1.0        
Credit Agreement | Maximum | Base Rate          
Debt.          
Margin (as a percent) 0.75%        
Credit Agreement | Maximum | Eurocurrency Rate          
Debt.          
Margin (as a percent) 1.75%        
Credit Agreement | Maximum | Index Rate          
Debt.          
Margin (as a percent) 1.75%        
Swingline loans          
Debt.          
Maximum borrowing capacity         5,000
Letters of credit          
Debt.          
Maximum borrowing capacity         $ 30,000
Outstanding borrowings     800    
Letters of credit | Minimum          
Debt.          
Leverage ratio to calculate annual commitment fee (as a percent) 0.15%        
Letters of credit | Maximum          
Debt.          
Leverage ratio to calculate annual commitment fee (as a percent) 0.30%        
Letters of credit (Other than Revolving Credit Agreement)          
Debt.          
Outstanding borrowings     $ 3,000    
Number of letters of credit issued | item   2 2    
Atlantic Innovation Fund of Canada          
Debt.          
Outstanding borrowings   CAD 1.2 $ 900    
Interest expense $ 0        
Number of remaining quarterly installments | item   27 27