The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

Name:	us-gaap_InsuranceRecoveries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Insurance Recovery - Additional Information (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Insurance Recovery [Line Items]
Insurance recovery proceeds	$ 18,000,000		$ 8,965,000
Surfactants Segment [Member]
Insurance Recovery [Line Items]
Insurance recovery proceeds		$ 5,200,000
Polymer Segment [Member]
Insurance Recovery [Line Items]
Insurance recovery proceeds		$ 12,800,000