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Long term debt (Tables)
12 Months Ended
Dec. 31, 2020
Debt Disclosure [Abstract]  
Schedule of long term debt
  NoteDecember 31, 2020December 31, 2019
Credit Facility7(a)$220,000 $190,000 
Convertible debentures7(b)55,000 94,031 
Mortgages21,206 21,739 
Financing obligations7(c)51,118 15,435 
Promissory notes7(d)12,726 14,648 
Unamortized deferred financing costs7(e)(2,196)(3,896)
 $357,854 $331,957 
Less: current portion of long-term debt(16,307)(18,514)
$341,547 $313,443 
December 31, 2020December 31, 2019
Cost $2,784 $4,918 
Accumulated amortization588 1,022 
$2,196 $3,896 
Schedule of convertible debt
Due to the November 1, 2019 reorganization of the NL Partnership, amounts outstanding under the Nuna Credit Facility as at December 31, 2019 are now included in investments in affiliates and joint ventures on the Consolidated Balance Sheets (note 10).
b) Convertible debentures
  December 31,
2020
December 31, 2019
5.00% convertible debentures
$55,000 $55,000 
5.50% convertible debentures
 39,031 
$55,000 $94,031 
The terms of the convertible debentures are summarized as follows:
Date of issuanceMaturityConversion priceShare equivalence per $1000 debentureDebt issuance costs
5.00% convertible debentures
March 20, 2019March 31, 2026$26.25 $38.0952 $2,691