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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2021
Feb. 21, 2022
Jun. 30, 2021
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2021    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Trading Symbol OLED    
Entity Registrant Name UNIVERSAL DISPLAY CORPORATION    
Entity Central Index Key 0001005284    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Shell Company false    
Title of 12(b) Security Common Stock, $0.01 par value    
Security Exchange Name NASDAQ    
Entity Incorporation, State or Country Code PA    
Entity Interactive Data Current Yes    
Entity Small Business false    
Entity Emerging Growth Company false    
Document Annual Report true    
Document Transition Report false    
Entity File Number 1-12031    
Entity Tax Identification Number 23-2372688    
Entity Address, Address Line One 250 Phillips Boulevard    
Entity Address, City or Town Ewing    
Entity Address, State or Province NJ    
Entity Address, Postal Zip Code 08618    
City Area Code 609    
Local Phone Number 671-0980    
Entity Common Stock, Shares Outstanding   48,496,383  
Entity Public Float     $ 9,594,897,936
ICFR Auditor Attestation Flag true    
Documents Incorporated by Reference

Portions of the registrant’s Proxy Statement for the 2022 Annual Meeting of Shareholders, which is to be filed with the Securities and Exchange Commission no later than May 2, 2022 (the first business day after the 120th day following the end of the registrant's fiscal year), are incorporated by reference into Part III of this report.

    
Auditor Firm ID 185    
Auditor Name KPMG, LLP    
Auditor Location Philadelphia, PA, USA