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BUSINESS COMBINATIONS (Tables)
 12 Months Ended
Dec. 31, 2011
Other Acquisitions
  
Business Acquisition [Line Items]  
Summary of the preliminary purchase price for Peak at the acquisition date
The following table summarizes the preliminary aggregate purchase price for the third quarter acquisitions at their acquisition dates (in thousands of U.S. dollars).
Cash consideration
$
112,450

Debt assumed and paid-off at acquisition date
25,183

Estimated net amount due to the sellers for working capital adjustments
3,694

Total estimated purchase price
$
141,327
Summary of recognized amounts of identifiable assets acquired and liabilities assumed
The following table summarizes the recognized amounts of identifiable assets acquired and liabilities assumed (in thousands). The fair value of all the acquired identifiable assets and liabilities summarized below is provisional pending finalization of the Company's acquisition accounting. Measurement period adjustments reflect new information obtained about facts and circumstances that existed as of the acquisition date. The Company believes that such information provides a reasonable basis for estimating the fair values of assets acquired and liabilities assumed, but the Company is waiting for additional information necessary to finalize fair value. The Company expects to finalize the valuation and complete the purchase price allocation as soon as practicable but no later than one year from the acquisition date. Final determination of the fair value may result in further adjustments to the values presented below.
 
At Acquisition Dates (As reported at September 30, 2011)
 
Measurement Period Adjustments
 
At Acquisition Dates (As Adjusted)
Current assets (i)
$
40,028

 
$
1,357

 
$
41,385

Property, plant and equipment
60,109

 
2,857

 
62,966

Customer relationships and other intangibles
23,371

 
—

 
23,371

Other assets
196

 
1,602

 
1,798

Current liabilities
(19,522
)
 
(3,039
)
 
(22,561
)
Asset retirement obligations
(193
)
 
(7
)
 
(200
)
Other liabilities
(4,469
)
 
1,728

 
(2,741
)
Total identifiable net assets
99,520

 
4,498

 
104,018

Goodwill (ii)
44,637

 
(7,328
)
 
37,309

Total
$
144,157

 
$
(2,830
)
 
$
141,327

____________
(i)
The preliminary fair value of the financial assets acquired includes customer receivables with a preliminary aggregate fair value of $21.4 million. Combined gross amounts due were $22.1 million.
(ii)
Goodwill represents the excess of the fair value of the net assets acquired over the purchase price. Goodwill of $13.2 million, $10.2 million and $13.9 million has been assigned to the Oil and Gas Field Services segment, the Technical Services segment, and the Industrial Services segment, respectively. Certain amounts will not be deductible for tax purposes.
Unaudited pro forma combined summary data as if Peak had been acquired at the beginning of the periods presented
The following unaudited pro forma combined summary data presents information as if the third quarter acquisitions had been acquired at the beginning of 2010 and assumes that there were no material, non-recurring pro forma adjustments directly attributable to the acquisitions. The pro forma information does not necessarily reflect the actual results that would have occurred had the Company and those three acquisitions been combined during the periods presented, nor is it necessarily indicative of the future results of operations of the combined companies (in thousands).
 
For the Year Ended December 31,
 
2011
 
2010
Pro forma combined revenues
$
2,091,102

 
$
1,892,906

Pro forma combined net income
$
129,106

 
$
138,549
Peak Energy Services Ltd.'s ('Peak')
  
Business Acquisition [Line Items]  
Summary of the preliminary purchase price for Peak at the acquisition date
The following table summarizes the preliminary purchase price for Peak at the acquisition date (in thousands of U.S. dollars).
Cash paid for Peak common shares
$
162,585

Fair value of previously owned common shares (i)
4,117

Peak net debt assumed (ii)
38,431

Total estimated purchase price
$
205,133

____________
(i)
The Company previously owned a 3.15% interest in Peak which was recorded in marketable securities. On June 10, 2011, the Company acquired the remaining outstanding shares of Peak and as a result, the Company remeasured the fair value of its previously held common shares and recognized the resulting gain of $1.9 million in other income. The unrealized gain on the Peak investment was previously recorded in accumulated other comprehensive income. For this purpose, the fair value of the Company’s previous investment in Peak was deemed to be $4.1 million, calculated based on the closing price of Peak’s shares on the Toronto Stock Exchange on the date before the acquisition was publicly announced.

(ii)
The outstanding Peak debt, net of $15.7 million of cash assumed, which consisted of three term loan facilities, was paid off on June 10, 2011.
Summary of recognized amounts of identifiable assets acquired and liabilities assumed
The following table summarizes the recognized amounts of identifiable assets acquired and liabilities assumed (in thousands). The fair value of all the acquired identifiable assets and liabilities summarized below is provisional pending finalization of the Company's acquisition accounting. Measurement period adjustments reflect new information obtained about facts and circumstances that existed as of the acquisition date. The Company believes that such information provides a reasonable basis for estimating the fair values of assets acquired and liabilities assumed but the Company is waiting for additional information necessary to finalize fair value. The Company expects to finalize the valuation and complete the purchase price allocation as soon as practicable but no later than one year from the acquisition date. Final determination of the fair value may result in further adjustments to the values presented below.
 
At June 10, 2011
(As reported at September 30, 2011)
 
Measurement
Period
Adjustments
 
At June 10,
2011
(As Adjusted)
Current assets(i)
$
44,986

 
$
1,557

 
$
46,543

Property, plant and equipment
150,265

 
1,309

 
151,574

Identifiable intangible assets
13,186

 
—

 
13,186

Other assets
1,109

 
5,822

 
6,931

Current liabilities
(28,360
)
 
(676
)
 
(29,036
)
Asset retirement obligations
(103
)
 
—

 
(103
)
Other liabilities
(8,126
)
 
(49
)
 
(8,175
)
Total identifiable net assets
$
172,957

 
$
7,963

 
$
180,920

Goodwill(ii)
32,176

 
(7,963
)
 
24,213

Total
$
205,133

 
$
—

 
$
205,133

____________
(i)
The preliminary fair value of the financial assets acquired includes customer receivables with a preliminary fair value of $33.3 million. The gross amount due was $34.7 million.

(ii)
Goodwill, which is attributable to expected operating and cross-selling synergies, will not be deductible for tax purposes. Goodwill of $8.2 million and $16.0 million has been recorded in the Oil and Gas Field Services and Industrial Services segments, respectively; however, the amount and the allocation are subject to change pending the finalization of the Company’s valuation.
Unaudited pro forma combined summary data as if Peak had been acquired at the beginning of the periods presented
The following unaudited pro forma combined summary data presents information as if Peak had been acquired at the beginning of 2010 and assumes that there was no material, non-recurring pro forma adjustment directly attributable to the acquisition. The pro forma information does not necessarily reflect the actual results that would have occurred had the Company and Peak been combined during the periods presented, nor is it necessarily indicative of the future results of operations of the combined companies (in thousands).
 
For the Year Ended December 31,
 
2011
 
2010
Pro forma combined revenues
$
2,079,329

 
$
1,879,749

Pro forma combined net income
$
129,103

 
$
128,481