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Commitments (Tables)
 12 Months Ended
Dec. 31, 2018
Commitments [Abstract]  
Expected Non-cancellable Operating Lease Payments Expected non-cancellable operating lease payments are as follows:

 

 

2018

 

 

2017

 

Less than one year

 

$

13,496

 

 

$

12,248

 

Between one and five years

 

 

36,639

 

 

 

27,445

 

Later than five years

 

 

17,797

 

 

 

21,909

 

 

 

$

67,932

 

 

$

61,602

 

 
Amounts Recognized as Expenses in Respect of Operating Leases

The following amounts were recognized as expenses in respect of operating leases in the consolidated statements of loss:

 

 

2018

 

 

2017

 

Operating leases

 

$

17,187

 

 

$

16,311

 

Sub-lease recoveries

 

 

(540

)

 

 

(441

)

 

 

$

16,647

 

 

$

15,870