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Condensed Consolidating Statement of Loss (Detail) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Disclosure of subsidiaries [Line Items] |  |
Revenue | $ 1,321,224 | $ 1,003,233
Operating expense | 926,171 | 661,715
General and administrative expense | 90,072 | 107,689
Restructuring |  | 5,754
Earnings before income taxes, loss on redemption and repurchase of unsecured senior notes, finance charges, foreign exchange, impairment of property, plant and equipment, gain on re-measurement of property, plant and equipment and depreciation and amortization | 304,981 | 228,075
Depreciation and amortization | 377,746 | 391,659
Impairment of property, plant and equipment | 15,313 |
Gain on re-measurement of property, plant and equipment |  | (7,605)
Operating loss | (88,078) | (155,979)
Foreign exchange | (2,970) | 6,008
Finance charges | 137,928 | 146,360
Loss on redemption and repurchase of unsecured senior notes | 9,021 | 239
Loss before tax | (232,057) | (308,586)
Income taxes | (100,021) | (153,031)
Net loss | (132,036) | (155,555)
Guarantor Subsidiaries [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Revenue | 1,138,049 | 846,867
Operating expense | 809,233 | 551,538
General and administrative expense | 44,932 | 59,323
Restructuring |  | 5,469
Earnings before income taxes, loss on redemption and repurchase of unsecured senior notes, finance charges, foreign exchange, impairment of property, plant and equipment, gain on re-measurement of property, plant and equipment and depreciation and amortization | 283,884 | 230,537
Depreciation and amortization | 302,958 | 324,649
Impairment of property, plant and equipment | 15,313 |
Gain on re-measurement of property, plant and equipment |  | (7,605)
Operating loss | (34,387) | (86,507)
Foreign exchange | (889) | (2,121)
Finance charges | (68) | 118
Loss before tax | (33,430) | (84,504)
Income taxes | (59,120) | (83,404)
Net loss | 25,690 | (1,100)
Non-Guarantor Subsidiaries [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Revenue | 190,401 | 169,287
Operating expense | 124,115 | 123,041
General and administrative expense | 9,535 | 11,173
Earnings before income taxes, loss on redemption and repurchase of unsecured senior notes, finance charges, foreign exchange, impairment of property, plant and equipment, gain on re-measurement of property, plant and equipment and depreciation and amortization | 56,751 | 35,073
Depreciation and amortization | 61,450 | 52,957
Operating loss | (4,699) | (17,884)
Foreign exchange | 294 | 1,398
Finance charges | (31) | 189
Loss before tax | (4,962) | (19,471)
Income taxes | 6,666 | 2,471
Net loss | (11,628) | (21,942)
Consolidating Adjustments [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Revenue | (7,315) | (13,024)
Operating expense | (7,315) | (13,024)
Depreciation and amortization | 220 | 225
Operating loss | (220) | (225)
Equity in loss of subsidiaries | 12,383 | (23,042)
Loss before tax | (12,603) | 22,817
Net loss | (12,603) | 22,817
Parent [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Revenue | 89 | 103
Operating expense | 138 | 160
General and administrative expense | 35,605 | 37,193
Restructuring |  | 285
Earnings before income taxes, loss on redemption and repurchase of unsecured senior notes, finance charges, foreign exchange, impairment of property, plant and equipment, gain on re-measurement of property, plant and equipment and depreciation and amortization | (35,654) | (37,535)
Depreciation and amortization | 13,118 | 13,828
Operating loss | (48,772) | (51,363)
Foreign exchange | (2,375) | 6,731
Finance charges | 138,027 | 146,053
Loss on redemption and repurchase of unsecured senior notes | 9,021 | 239
Equity in loss of subsidiaries | (12,383) | 23,042
Loss before tax | (181,062) | (227,428)
Income taxes | (47,567) | (72,098)
Net loss | $ (133,495) | $ (155,330)

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