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Acquisitions - TBEI acquisition (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jun. 02, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Business Acquisition [Line Items] |  |  |  |
Goodwill acquired during period |  |  |  | $ 136.0
Definite-lived intangible asset, useful life |  |  | 12 years |
TBEI |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Purchase price, inclusive of adjustment for working capital and other post-closing items | [1] | $ 268.8 |  |
Total consideration |  | 268.8 |  |
Cash |  | 2.6 |  |
Accounts receivable |  | 23.7 |  |
Inventories |  | 24.3 |  |
Prepaid expenses and other current assets |  | 2.6 |  |
Rental equipment |  | 0.7 |  |
Properties and equipment |  | 20.6 |  |
Customer relationships | [2] | 90.0 |  |
Trade names | [3] | 54.0 |  |
Other intangible assets |  | 1.7 |  |
Accounts payable |  | (18.7) |  |
Accrued liabilities |  | (7.3) |  |
Deferred tax liabilities |  | (61.4) |  |
Net assets acquired |  | 132.8 |  |
Goodwill acquired during period | [4] |  |  | 136.0
Purchase price funded under revolving credit facility |  | $ 243.0 |  |
Environmental Solutions |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill acquired during period |  |  |  | $ 136.0
Customer Relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Definite-lived intangible asset, useful life |  |  | 12 years |
[1] | $243.0 million of the purchase price was funded through borrowings under the Company’s revolving credit facility, with the remainder being funded with existing cash on hand. The purchase price includes an adjustment for working capital and other post-closing items of $3.0 million that the Company received in the first quarter of 2018.
[2] | Represents the fair value assigned to customer relationships, which are considered to be definite-lived intangible assets, with an estimated useful life of approximately 12 years.
[3] | Represents the fair value assigned to trade names, which are considered to be indefinite-lived intangible assets.
[4] | Goodwill, which is not deductible for tax purposes, has been allocated to the Environmental Solutions Group on the basis that the synergies identified will primarily benefit this segment.

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