Capital disclosures (Tables)

12 Months Ended

Dec. 31, 2018

Corporate Information And Statement Of IFRS Compliance [Abstract]

Schedule of liquidity and capitalization

As at	Dec 31 2018			Dec 31 2017
Liquidity:
Cash and cash equivalents	$	256,077		$	375,479
Undrawn credit facilities	300,000			300,000
Total liquidity	$	556,077		$	675,479
Capitalization:
Unsecured notes, including current portion	$	1,189,976		$	1,188,163
Egypt limited recourse debt facilities, including current portion	101,226			241,190
Other limited recourse debt facilities, including current portion	167,084			72,918
Total debt	1,458,286			1,502,271
Non-controlling interests	296,628			244,347
Shareholders’ equity	1,511,213			1,500,764
Total capitalization	$	3,266,127		$	3,247,382
Total debt to capitalization1	45		%	46		%
Net debt to capitalization2	40		%	39		%

¹ Total debt (including 100% of Egypt and Other limited recourse debt facilities) divided by total capitalization.

² Total debt (including 100% of Egypt and Other limited recourse debt facilities) less cash and cash equivalents divided by total capitalization less cash and cash equivalents.