Asset Impairment Charges and Facility Closing and Reorganization Costs - Narrative (Detail)	12 Months Ended
Dec. 31, 2017 USD ($)
Closure of facilities
Restructuring Cost and Reserve [Line Items]
Impairments of plant, property and equipment	$ 27,818,000.000
Organization effectiveness
Restructuring Cost and Reserve [Line Items]
Impairments of plant, property and equipment	$ 2,900,000

The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2921-110230

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760

Name:	us-gaap_TangibleAssetImpairmentCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration