Acquisitions - Additional Information (Details) $ in Millions		3 Months Ended	6 Months Ended
	Jun. 01, 2017 USD ($)	Mar. 31, 2018 USD ($) business	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 01, 2018 USD ($)
Business Acquisition [Line Items]
Percent acquired			24.50%
Payments to Acquire Other Investments		$ 26.9
Noncontrolling Interest, Ownership Percentage by Parent			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)				$ 53.8
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		2
Acquisition costs			$ 75.4
Finite-lived intangible assets acquired		$ 61.6
Acquired finite-lived intangible assets, weighted average useful life (in years)		9 years