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BUSINESS COMBINATIONS (Tables)
 3 Months Ended
Mar. 31, 2017
Business Combinations [Abstract]  
Schedule of Business Acquisitions, by Acquisition
The components and preliminary allocation of the purchase price consist of the following amounts (in thousands):
 
At Acquisition Dates As Reported
December 31, 2016
 
Measurement Period Adjustments
 
At Acquisition Dates As Reported
March 31, 2017
Accounts receivable
$
15,767

 
$
629

 
$
16,396

Inventories and supplies
12,515

 
173

 
12,688

Prepaid expenses and other current assets
777

 
(25
)
 
752

Property, plant and equipment
143,025

 
625

 
143,650

Permits and other intangibles
28,856

 
—

 
28,856

Current liabilities
(20,258
)
 
392

 
(19,866
)
Closure and post-closure liabilities

(2,408
)
 
(596
)
 
(3,004
)
Remedial liabilities, less current portion
(2,041
)
 
16

 
(2,025
)
Deferred taxes, unrecognized tax benefits and other long-term liabilities
(17,019
)
 
(456
)
 
(17,475
)
Total identifiable net assets
159,214

 
758

 
159,972

Goodwill
45,791

 
(731
)
 
45,060

Total purchase price, net of cash acquired
$
205,005

 
$
27

 
$
205,032