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Long-term debt (Tables)
12 Months Ended
Dec. 31, 2020
Financial Instruments [Abstract]  
Schedule of long-term debt
As atDec 31
2020
Dec 31
2019
Unsecured notes
(i) $250 million at 5.25% due March 1, 2022
 248,912 
(ii) $300 million at 4.25% due December 1, 2024
297,999 297,607 
(iii) $700 million at 5.125% due October 15, 2027
691,434 — 
(iv) $700 million at 5.25% due December 15, 2029
694,282 693,822 
(v) $300 million at 5.65% due December 1, 2044
295,410 295,321 
1,979,125 1,535,662 
Geismar 3 construction facility at LIBOR+3%
176,335 — 
Egypt limited recourse debt facilities46,948 75,165 
Other limited recourse debt facilities
(i) LIBOR+0.75% to LIBOR+2.5% due through 2019 to 2021
 1,526 
(ii) 5.58% due through June 30, 2031
69,734 73,700 
(iii) 5.35% due through September 30, 2033
78,391 82,800 
(iv) 5.08% due through September 15, 2036
12,839 — 
160,964 158,026 
Total long-term debt1
2,363,372 1,768,853 
Less current maturities1
(39,771)(38,420)
$2,323,601 $1,730,433 
1  Long-term debt and current maturities are presented net of discounts and deferred financing fees of $25.4 million as at December 31, 2020 (2019 - $20.4 million).
Schedule of minimum principal payments for long-term debt
The gross minimum principal payments for long-term debt in aggregate and for each of the five succeeding years are as follows:
Egypt limited recourse debt facilitiesOther limited recourse debt facilitiesUnsecured
notes
Construction Facility1
Total
2021$31,552$8,824$— $— $40,376
202216,60611,778— — 28,384
2023— 12,424— — 12,424
2024— 12,576300,000 173,000 485,576
2025— 13,654— — 13,654
Thereafter
— 105,0021,700,000 — 1,805,002
$48,158 $164,258$2,000,000 $173,000 $2,385,416
1  Balance in long-term debt exceeds the principal payments by $3.3 million due the treatment for modification of interest terms.
Disclosure of debt covenants The impact on the remaining periods for which the waivers apply is as follows:
Four quarters ended
Minimum interest coverage ratio 2
Minimum EBITDA 1 2
Q4 2020not applicable
$25 million
Q1 2021not applicable
$30 million
Q2 2021not applicable
$70 million
Q3 2021
1.00x
not applicable
Q4 2021
1.25x
not applicable
Q1 2022 & thereafter
2.00x
not applicable
1 EBITDA is defined under the terms of the credit facilities.
2 The minimum EBITDA or minimum interest coverage ratio provision may be fully waived for any two of the remaining measurement periods until Q4 2021.