XML 89 R72.htm IDEA: XBRL DOCUMENT v3.20.1
Cash (Narrative) (Details)
$ in Thousands, $ in Millions
Dec. 31, 2019
CAD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
CAD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
CAD ($)
Disclosure Of Information For Cash [Line Items]          
Cash $ 108,223   $ 174,265   $ 333,705
Cash held in USD [Member]          
Disclosure Of Information For Cash [Line Items]          
Cash $ 95,500 $ 73.5 $ 71,900 $ 52.7