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BUSINESS COMBINATIONS (Tables)
12 Months Ended
Dec. 31, 2015
Thermo Fluids Inc.  
Business Acquisition [Line Items]  
Summary of recognized amounts of identifiable assets acquired and liabilities assumed
The components and preliminary allocation of the purchase price consist of the following amounts (in thousands):
 
At acquisition date April 11, 2015
 
Measurement Period Adjustments
 
At acquisition date as reported at
December 31, 2015
Accounts Receivable
$
7,109

 
$
476

 
$
7,585

Inventories and supplies
1,791

 

 
1,791

Prepaid expenses and other current assets
1,749

 
(1,084
)
 
665

Property, plant and equipment
30,468

 
(1,606
)
 
28,862

Permits and other intangibles
20,000

 
(1,900
)
 
18,100

Current liabilities
(5,859
)
 
14

 
(5,845
)
Closure and post-closure liabilities
(1,676
)
 

 
(1,676
)
Deferred taxes, unrecognized tax benefits and other long-term liabilities
(13,081
)
 
3,051

 
(10,030
)
Total identifiable net assets
40,501

 
(1,049
)
 
39,452

Goodwill
36,591

 
2,543

 
39,134

Total
$
77,092

 
$
1,494

 
$
78,586

Evergreen Oil, Inc.  
Business Acquisition [Line Items]  
Summary of recognized amounts of identifiable assets acquired and liabilities assumed
The following table summarizes the recognized amounts of assets acquired and liabilities assumed at September 13, 2013 (in thousands):
 
Preliminary Allocations
 
Measurement Period Adjustments
 
Final Allocations
Inventories and supplies
$
1,089

 
$

 
$
1,089

Prepaid expense and other current assets
1,291

 
(273
)
 
1,018

Property, plant and equipment
40,563

 

 
40,563

Permits and other intangibles
17,100

 

 
17,100

Deferred tax assets, less current portion
2,368

 
(2,368
)
 

Other assets
3,607

 
(239
)
 
3,368

Current liabilities
(6,198
)
 
(552
)
 
(6,750
)
Closure and post-closure liabilities
(659
)
 

 
(659
)
Remedial liabilities, less current portion
(2,103
)
 
463

 
(1,640
)
Other long-term liabilities
(1,139
)
 
(920
)
 
(2,059
)
Total identifiable net assets
55,919

 
(3,889
)
 
52,030

Goodwill

 
4,288

 
4,288

Total
$
55,919

 
$
399

 
$
56,318