XML 79 R69.htm IDEA: XBRL DOCUMENT v3.20.1
Schedule of Property, Plant and Equipment (Detail) - CAD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment $ 2,749,463 $ 3,038,612  
Rig Equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 2,510,505 2,745,172  
Rental Equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 34,437 43,992  
Other Equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 38,604 52,195  
Vehicles [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 7,796 12,702  
Buildings [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 56,834 65,561  
Assets Under Construction [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 67,740 84,561  
Land [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 33,547 34,429  
Gross [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 6,670,979 6,937,062 $ 6,733,634
Gross [Member] | Rig Equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 6,109,383 6,322,536 6,034,166
Gross [Member] | Rental Equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 110,307 130,463 148,011
Gross [Member] | Other Equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 185,319 191,290 244,950
Gross [Member] | Vehicles [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 38,506 45,456 43,201
Gross [Member] | Buildings [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 126,177 128,327 127,385
Gross [Member] | Assets Under Construction [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 67,740 84,561 102,035
Gross [Member] | Land [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 33,547 34,429 33,886
Accumulated Depreciation [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 3,921,516 3,898,450 3,559,810
Accumulated Depreciation [Member] | Rig Equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 3,598,878 3,577,364 3,210,384
Accumulated Depreciation [Member] | Rental Equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 75,870 86,471 87,832
Accumulated Depreciation [Member] | Other Equipment [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 146,715 139,095 178,390
Accumulated Depreciation [Member] | Vehicles [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment 30,710 32,754 26,921
Accumulated Depreciation [Member] | Buildings [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment $ 69,343 $ 62,766 $ 56,283