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v3.20.1

Change in Property, Plant and Equipment (Detail) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | $ 3,038,612 |
Reversal of impairment of property, plant and equipment | (5,810) |
Ending Balance | 2,749,463 | $ 3,038,612
Gross [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 6,937,062 | 6,733,634
Additions | 159,886 | 114,576
Disposals | (100,707) | (115,029)
Reclassification to assets held for sale |  | (135,398)
Asset decommissioning | (4,364) |
Effect of foreign currency exchange differences | (320,898) | 339,279
Ending Balance | 6,670,979 | 6,937,062
Accumulated Depreciation [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 3,898,450 | 3,559,810
Depreciation expense | 320,736 | 373,572
Disposals | (59,962) | (102,886)
Reclassification to assets held for sale |  | (115,740)
Asset decommissioning | (3,518) |
Reversal of impairment of property, plant and equipment | (5,810) |
Effect of foreign currency exchange differences | (228,380) | 183,694
Ending Balance | 3,921,516 | 3,898,450
Rig Equipment [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 2,745,172 |
Ending Balance | 2,510,505 | 2,745,172
Rig Equipment [Member] | Gross [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 6,322,536 | 6,034,166
Additions | 18,436 | 7,013
Disposals | (69,945) | (32,153)
Reclassifications | 150,674 | 127,668
Reclassification to assets held for sale |  | (135,398)
Asset decommissioning | (4,364) |
Effect of foreign currency exchange differences | (307,954) | 321,240
Ending Balance | 6,109,383 | 6,322,536
Rig Equipment [Member] | Accumulated Depreciation [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 3,577,364 | 3,210,384
Depreciation expense | 289,056 | 335,215
Disposals | (33,929) | (28,399)
Reclassification to assets held for sale |  | (115,740)
Asset decommissioning | (3,518) |
Reversal of impairment of property, plant and equipment | (5,810) |
Effect of foreign currency exchange differences | (224,285) | 175,904
Ending Balance | 3,598,878 | 3,577,364
Rental Equipment [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 43,992 |
Ending Balance | 34,437 | 43,992
Rental Equipment [Member] | Gross [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 130,463 | 148,011
Disposals | (19,982) | (18,227)
Effect of foreign currency exchange differences | (174) | 679
Ending Balance | 110,307 | 130,463
Rental Equipment [Member] | Accumulated Depreciation [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 86,471 | 87,832
Depreciation expense | 7,473 | 9,418
Disposals | (17,933) | (11,249)
Effect of foreign currency exchange differences | (141) | 470
Ending Balance | 75,870 | 86,471
Other Equipment [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 52,195 |
Ending Balance | 38,604 | 52,195
Other Equipment [Member] | Gross [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 191,290 | 244,950
Additions | 976 | 347
Disposals | (4,708) | (59,865)
Reclassifications | 1,197 | 507
Effect of foreign currency exchange differences | (3,436) | 5,351
Ending Balance | 185,319 | 191,290
Other Equipment [Member] | Accumulated Depreciation [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 139,095 | 178,390
Depreciation expense | 13,023 | 15,993
Disposals | (3,274) | (59,857)
Effect of foreign currency exchange differences | (2,129) | 4,569
Ending Balance | 146,715 | 139,095
Vehicles [member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 12,702 |
Ending Balance | 7,796 | 12,702
Vehicles [member] | Gross [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 45,456 | 43,201
Additions | 224 |
Disposals | (6,014) | (228)
Effect of foreign currency exchange differences | (1,160) | 2,483
Ending Balance | 38,506 | 45,456
Vehicles [member] | Accumulated Depreciation [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 32,754 | 26,921
Depreciation expense | 3,521 | 4,820
Disposals | (4,768) | (220)
Effect of foreign currency exchange differences | (797) | 1,233
Ending Balance | 30,710 | 32,754
Buildings [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 65,561 |
Ending Balance | 56,834 | 65,561
Buildings [Member] | Gross [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 128,327 | 127,385
Additions | 415 | 569
Disposals | (58) | (3,663)
Effect of foreign currency exchange differences | (2,507) | 4,036
Ending Balance | 126,177 | 128,327
Buildings [Member] | Accumulated Depreciation [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 62,766 | 56,283
Depreciation expense | 7,663 | 8,126
Disposals | (58) | (3,161)
Effect of foreign currency exchange differences | (1,028) | 1,518
Ending Balance | 69,343 | 62,766
Assets Under Construction [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 84,561 |
Ending Balance | 67,740 | 84,561
Assets Under Construction [Member] | Gross [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 84,561 | 102,035
Additions | 139,835 | 106,647
Reclassifications | (151,871) | (128,175)
Effect of foreign currency exchange differences | (4,785) | 4,054
Ending Balance | 67,740 | 84,561
Land [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 34,429 |
Ending Balance | 33,547 | 34,429
Land [Member] | Gross [Member] |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |
Beginning Balance | 34,429 | 33,886
Disposals |  | (893)
Effect of foreign currency exchange differences | (882) | 1,436
Ending Balance | $ 33,547 | $ 34,429

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