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BUSINESS COMBINATIONS (Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands | 7 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2018 | Feb. 23, 2018 | Dec. 31, 2017
Business Acquisition [Line Items] |  |  |
Goodwill | $ 514,102 |  | $ 478,523
Veolia Division |  |  |
Business Acquisition [Line Items] |  |  |
Accounts receivable | 38,193 | $ 40,773 |
Measurement Period Adjustments, Accounts receivable, including unbilled receivables | (2,580) |  |
Inventories and supplies | 1,126 | 1,442 |
Measurement Period Adjustments, Inventories and supplies | (316) |  |
Prepaid and other current assets | 786 | 1,005 |
Measurement Period Adjustments, Prepaid expenses and other current assets | (219) |  |
Property, plant and equipment | 72,244 | 72,244 |
Measurement Period Adjustments, Property, plant and equipment | 0 |  |
Permits and other intangibles | 5,140 | 5,140 |
Measurement Period Adjustments, Permits and other intangibles | 0 |  |
Current liabilities | (18,625) | (15,908) |
Measurement Period Adjustments, Current liabilities | (2,717) |  |
Closure and post-closure liabilities | (354) | (604) |
Measurement Period Adjustments, Closure and post-closure liabilities | 250 |  |
Total identifiable net assets | 98,510 | 104,092 |
Measurement Period Adjustments, Total identifiable net assets | (5,582) |  |
Goodwill | 21,490 | 15,908 |
Measurement Period Adjustments, Goodwill | 5,582 |  |
Total purchase price, net of cash acquired | 120,000 | $ 120,000 |
Measurement Period Adjustments, Total purchase price, net of cash acquired | $ 0 |  |

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