Cover Page - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Feb. 19, 2021	Jun. 30, 2020
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	001-02960
Entity Registrant Name	Newpark Resources, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	72-1123385
Entity Address, Address Line One	9320 Lakeside Boulevard,
Entity Address, Address Line Two	Suite 100
Entity Address, City or Town	The Woodlands,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77381
City Area Code	281
Local Phone Number	362-6800
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 196.6
Entity Common Stock, Shares Outstanding (in shares)		90,954,157
Documents Incorporated by Reference	Pursuant to General Instruction G(3) to this Form 10-K, the information required by Items 10, 11, 12, 13 and 14 of Part III hereof is incorporated by reference from the registrant’s definitive Proxy Statement for its 2021 Annual Meeting of Stockholders.
Document Fiscal Year Focus	2020
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0000071829
Amendment Flag	false
Document Fiscal Period Focus	FY
Common Stock
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	NR
Security Exchange Name	NYSE
Rights To Purchase Series D Junior Participating Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Rights to Purchase Series D Junior Participating Preferred Stock
Security Exchange Name	NYSE
No Trading Symbol Flag	true