Proposed Acquisitions - Additional Information (Details) - G P Business [Member] $ in Millions		12 Months Ended
Jun. 19, 2018 USD ($) Employee t	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
Business acquisition purchase price	$ 185
Business acquisition, date of definitive agreement	Jun. 19, 2018
Annual production capacity \| t	32,000
Number of employees at manufacturing facility \| Employee	220
Annual sales of acquiree		$ 99

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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