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Consolidated Statements of Operations and Comprehensive Income (loss) (CAD)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Income Statement [Abstract]    
Revenue 470,484 595,422
Project costs 180,348 278,266
Equipment costs 184,931 204,475
Equipment operating lease expense 22,975 43,286
Depreciation 36,491 45,365
Gross profit 45,739 24,030
General and administrative expenses 39,901 42,579
Loss on disposal of property, plant and equipment 3,033 1,837
Loss (gain) on disposal of assets held for sale (note 9) 2,212 (90)
Amortization of intangible assets (note 12(b)) 3,276 3,686
Equity in earnings of unconsolidated joint venture 0 (846)
Operating loss before the undernoted (2,683) (23,136)
Interest expense (note 21) 21,697 23,540
Foreign exchange (gain) loss (156) 119
Unrealized gain on derivative financial instruments (note 16(a)) (6,551) (4,017)
Loss on debt extinguishment (note 15(d)) 6,476 0
Loss from continuing operations before income taxes (24,149) (42,778)
Income tax (note 10):    
Current (benefit) expense (2,438) 1,030
Deferred benefit (3,664) (11,312)
Net loss from continuing operations (18,047) (32,496)
Income from discontinued operations, net of tax (note 22) 87,231 18,823
Net income (loss) 69,184 (13,673)
Other comprehensive income (loss)    
Unrealized foreign currency translation gain (loss) 27 (32)
Comprehensive income (loss) 69,211 (13,705)
Per share information from continuing operations    
Net loss - basic (note 18) (in CAD per share) (0.50) (0.90)
Net loss - diluted (note 18) (in CAD per share) (0.50) (0.90)
Net income - basic (note 18) (in CAD per share) 2.41 0.52
Net income - diluted (note 18) (in CAD per share) 2.39 0.52
Net income (loss) - basic (note 18) (in CAD per share) 1.91 (0.38)
Net income (loss) - diluted (note 18) (in CAD per share) 1.89 (0.38)