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Acquisitions - Narrative (Details) CAD in Millions, $ in Millions |  |  | 3 Months Ended | 7 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jun. 02, 2017 USD ($) | Jun. 03, 2016 CAD facility | Jun. 03, 2016 USD ($) facility | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Acquisition related costs |  |  |  |  |  |  | $ 1.7 | $ 0.9 |
Payments to acquire business, net |  |  |  |  |  |  | 269.2 | 102.6 | $ 0.0
Joe Johnson Equipment | Manufacturing Facility [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Lessee Leasing Arrangements, Operating Leases, Number of Units | facility |  |  | 2 | 2 |  |  |  |  |
Lessee Leasing Arrangements, Operating Leases, Term of Contract |  |  | 5 years | 5 years |  |  |  |  |
Payments for Rent |  |  |  |  |  |  | 0.4 | 0.2 |
Ingenieria Y Servicios Orbitec SPA [Member] |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Revenue from Related Parties |  |  |  |  |  |  | 0.7 | 1.7 |
TBEI |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Purchase price, inclusive of working capital adjustment |  | $ 271.8 |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  | 100.00% |  |  |  |  |  |  |
TBEI | Environmental Solutions |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  |  |  |  |  | $ 109.4 |  |  |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |  |  |  |  |  | $ 6.2 |  |  |
Joe Johnson Equipment |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Purchase price, inclusive of working capital adjustment | [1] |  |  | $ 96.6 |  |  |  |  |
Expense recognized relating to change in fair value of contingent consideration liability | [2] |  |  |  |  |  | 0.8 | 0.4 |
Acquisition deferred payment |  |  | CAD 8.0 | 6.4 |  |  |  |  |
Acquisition contingent earn-out |  |  | CAD 10.0 | $ 8.0 |  |  |  |  |
Expenses recognized in relation to accretion of discount on deferred payment obligation |  |  |  |  |  |  | $ 0.2 | $ 0.1 |
Subsequent Event | TBEI |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Other Payments to Acquire Businesses |  |  |  |  | $ 3.0 |  |  |  |
[1] | The initial purchase price was funded with existing cash on hand and borrowings under the Company’s revolving credit facility.
[2] | Changes in the fair value of contingent consideration liabilities are included as a component of Acquisition and integration-related expenses within the Consolidated Statements of Operations.

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