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Summary of Operating Segments (Detail) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Jan. 01, 2023
Disclosure of operating segments [Line Items]      
Revenue $ 1,902,328 $ 1,937,854  
Earnings before income taxes, gain on repurchase of unsecured senior notes, gain on acquisition, loss on investmentsand other assets, finance charges, foreignexchange, loss on asset decommissioning,gain on asset disposals and depreciation and amortization 154,559 265,779  
Depreciation and amortization 309,314 297,557  
Foreign exchange 2,259 (1,667)  
Finance charges 69,753 83,414  
Gain on acquisition 0 (25,761)  
Gain on repurchase of unsecured senior notes 0 (137)  
Income taxes 43,229 (23,465)  
Loss on asset decommissioning 0 9,592  
Net earnings for reportable segments 111,330 289,244  
Total assets 2,956,315 3,019,035 $ 2,876,123
All Other Segments [Member]      
Disclosure of operating segments [Line Items]      
Revenue 1,902,328 1,937,854  
Earnings before income taxes, gain on repurchase of unsecured senior notes, gain on acquisition, loss on investmentsand other assets, finance charges, foreignexchange, loss on asset decommissioning,gain on asset disposals and depreciation and amortization 521,221 611,118  
Depreciation and amortization 309,314 297,557  
Gain on asset disposals 16,148 24,469  
Foreign exchange 2,259 (1,667)  
Finance charges 69,753 83,414  
Loss on investments and other assets 1,484 6,810  
Gain on acquisition   (25,761)  
Gain on repurchase of unsecured senior notes   (137)  
Income taxes 43,229 (23,465)  
Loss on asset decommissioning   9,592  
Net earnings for reportable segments 111,330 289,244  
Total assets 2,956,315 3,019,035  
Capital expenditures 216,698 226,749  
Contract Drilling Services [Member]      
Disclosure of operating segments [Line Items]      
Revenue 1,617,735 1,704,265  
Earnings before income taxes, gain on repurchase of unsecured senior notes, gain on acquisition, loss on investmentsand other assets, finance charges, foreignexchange, loss on asset decommissioning,gain on asset disposals and depreciation and amortization 532,345 630,761  
Depreciation and amortization 279,247 269,133  
Gain on asset disposals 8,745 23,378  
Foreign exchange 1,164 229  
Finance charges 1,707 1,489  
Income taxes 38,869 (122,065)  
Loss on asset decommissioning   9,592  
Net earnings for reportable segments 220,103 495,761  
Total assets 2,562,436 2,565,495  
Capital expenditures 197,010 213,660  
Completion and Production Services [Member]      
Disclosure of operating segments [Line Items]      
Revenue 294,817 240,716  
Earnings before income taxes, gain on repurchase of unsecured senior notes, gain on acquisition, loss on investmentsand other assets, finance charges, foreignexchange, loss on asset decommissioning,gain on asset disposals and depreciation and amortization 66,681 51,224  
Depreciation and amortization 20,831 14,654  
Gain on asset disposals 4,524 973  
Foreign exchange (46) (9)  
Finance charges 422 467  
Income taxes 9,155 (25,362)  
Net earnings for reportable segments 40,843 62,447  
Total assets 241,277 271,724  
Capital expenditures 17,495 9,984  
Corporate and Other [Member]      
Disclosure of operating segments [Line Items]      
Earnings before income taxes, gain on repurchase of unsecured senior notes, gain on acquisition, loss on investmentsand other assets, finance charges, foreignexchange, loss on asset decommissioning,gain on asset disposals and depreciation and amortization (77,805) (70,867)  
Depreciation and amortization 9,236 13,770  
Gain on asset disposals 2,879 118  
Foreign exchange 1,141 (1,887)  
Finance charges 67,624 81,458  
Loss on investments and other assets 1,484 6,810  
Gain on acquisition   (25,761)  
Gain on repurchase of unsecured senior notes   (137)  
Income taxes (4,795) 123,962  
Net earnings for reportable segments (149,616) (268,964)  
Total assets 152,602 181,816  
Capital expenditures 2,193 3,105  
Inter-Segment Eliminations [Member]      
Disclosure of operating segments [Line Items]      
Revenue $ (10,224) $ (7,127)