Acquisitions - Additional Information (Details) $ in Millions		3 Months Ended	9 Months Ended
	Jun. 01, 2017 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2018 USD ($) business	Sep. 30, 2017 USD ($)
Business Acquisition [Line Items]
Percent acquired		24.50%	24.50%
Payments to Acquire Other Investments			$ 26.9
Noncontrolling Interest, Ownership Percentage by Parent		75.50%	75.50%
Industrial Wood Acquisition [Member]
Business Acquisition [Line Items]
Payments to acquire businesses, gross	$ 420.0
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	$ 430.3
Business Acquisition, Pro Forma Net Income (Loss)				$ 108.8
Industrial Wood Acquisition [Member] | Acquisition-related Costs [Member]
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Net Income (Loss)				5.3
Industrial Wood Acquisition [Member] | Acquisition-related Costs, Net of Tax [Member]
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Net Income (Loss)				3.3
Industrial Wood Acquisition [Member] | Fair Value Adjustment to Inventory [Member]
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Net Income (Loss)				2.3
Industrial Wood Acquisition [Member] | Fair Value Adjustment to Inventory, net of tax [Member]
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Net Income (Loss)				$ 1.4
2018 Acquisitions [Member]
Business Acquisition [Line Items]
Number of businesses acquired | business			4
Acquisition costs		$ 1.0	$ 76.4
Finite-lived intangible assets acquired			$ 61.6
Acquired finite-lived intangible assets, weighted average useful life (in years)			9 years
Asia Pacific [Member] | 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Number of businesses acquired | business			2
North America [Member] | 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Number of businesses acquired | business			2