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Acquisitions (Details) CAD in Millions, $ in Millions | Feb. 29, 2016 CAD | Feb. 29, 2016 USD ($) | Jan. 05, 2016 CAD | Jan. 05, 2016 USD ($) | Mar. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
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Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill | $ |  |  |  |  | $ 236.2 | $ 231.6
Westech Vac Systems, Ltd. (“Westech”) [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  | 100.00% |  |
Payments to acquire business, net |  |  | CAD 8.6 | $ 6.2 |  |
Goodwill | $ |  |  |  | $ 3.4 |  |
Joe Johnson Equipment [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business Combination, Consideration Transferred | CAD 108.0 | $ 79.0 |  |  |  |
Acquisition Deferred Payment | CAD | 8.0 |  |  |  |  |
Acquisition contingent earn-out | CAD | CAD 10.0 |  |  |  |  |

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