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Business Acquisitions - Additional Information (Details) - Conwed Plastics LLC [Member] - USD ($) $ in Millions		3 Months Ended	9 Months Ended	12 Months Ended
	Jan. 20, 2017	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Consideration, cash	$ 295.0
Potential earn-out payments	40.0
Consideration, acquisition-date fair value of earn-out payments	8.6
Consideration, total	303.6
Accounts receivable, fair value	15.4
Accounts receivable, gross contractual amount	15.8
Inventory acquired	20.6
Financing costs		$ 0.6
Inventory step-up in basis [Member]
Business Acquisition [Line Items]
Inventory acquired	$ 2.9
Acquisition-related Costs [Member]
Business Acquisition [Line Items]
Acquisition-related costs			$ 0.1	$ 1.4

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Business Combination, Financing Costs

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Fair value of acquired receivable from business combination, excluding certain loans and debt securities acquired in transfer.

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For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the gross contractual amounts receivable, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

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The amount of inventory recognized as of the acquisition date.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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