BUSINESS COMBINATIONS Peak (Details) (Peak Energy Services Ltd.'s ('Peak'))	1 Months Ended	12 Months Ended
	Jun. 30, 2012 USD ($)	Dec. 31, 2011 USD ($)	Jun. 10, 2012 USD ($) TermLoanFacilities	Jun. 10, 2011 USD ($)		Jun. 10, 2011 CAD	Dec. 31, 2012 Oil and Gas Field Services USD ($)	Dec. 31, 2012 Industrial Services USD ($)
Business Acquisition, Cost of Acquired Entity [Abstract]
Outstanding common shares acquired (as a percent)				100.00%		100.00%
Percentage of outstanding common shares of acquiree already owned by company (as a percent)				3.15%		3.15%
Cash paid in exchange for acquisition						158,700,000
Cash paid per share in exchange for acquisition (in dollars per share)						0.95
Business Acquisition, Cost of Acquired Entity, Purchase Price				205,133,000		200,200,000
Exchange rate translation				0.976057		0.976057
Business Combination, Consideration Transferred [Abstract]
Cash Consideration				162,585,000
Fair value of previously owned common shares				4,117,000
Net debt assumed				38,431,000		37,500,000
Total purchase price				205,133,000
Gain loss recognized in other income previously held as common shares	1,900,000
Fair value of common shares in acquiree			4,100,000
Cash assumed for repayment of outstanding debt			15,700,000
Number of term loan facilities			3
Acquisition related costs		700,000
Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net [Abstract]
Other current assets (i)				45,222,000	[1]
Property, plant and equipment				151,574,000
Permits and other intangibles				12,337,000
Other assets				8,009,000
Current liabilities				(28,785,000)
Asset retirement obligations				(103,000)
Other liabilities				(11,341,000)
Total identifiable net assets				176,913,000
Goodwill (ii)				28,220,000	[2]		12,900,000	15,300,000
Business Combination, Acquired Receivables, Fair Value				33,300,000
Customer receivables, gross amount due				$ 34,700,000

[1] The fair value of the financial assets acquired included customer receivables with a fair value of $33.3 million. The gross amount due was $34.7 million.

[2] Goodwill, which is attributable to expected operating and cross-selling synergies, will not be deductible for tax purposes. Goodwill of $12.9 million and $15.3 million has been recorded in the Oil and Gas Field Services and Industrial Services segments, respectively.