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Document and Entity Information - USD ($)
 12 Months Ended
Mar. 31, 2021
May 24, 2021
Sep. 30, 2020
Cover [Abstract]      
Entity Registrant Name NEXTGEN HEALTHCARE, INC.    
Trading Symbol NXGN    
Entity Central Index Key 0000708818    
Document Type 10-K    
Document Period End Date Mar. 31, 2021    
Amendment Flag false    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --03-31    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 704,935,000
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity File Number 001-12537    
Entity Tax Identification Number 95-2888568    
Entity Address, Address Line One 3525 Piedmont Rd., NE    
Entity Address, Address Line Two Building 6, Suite 700    
Entity Address, City or Town Atlanta    
Entity Address, State or Province GA    
Entity Address, Postal Zip Code 30305    
City Area Code (404)    
Local Phone Number 467-1500    
Entity Interactive Data Current Yes    
Title of 12(b) Security Common Stock, $0.01 Par Value    
Security Exchange Name NASDAQ    
Entity Incorporation, State or Country Code CA    
Document Annual Report true    
Document Transition Report false    
Entity Common Stock, Shares Outstanding   67,031,182  
Documents Incorporated by Reference

Portions of the registrant's definitive proxy statement related to the 2021 Annual Shareholders' Meeting to be filed with the Securities and Exchange Commission within 120 days of the registrant’s fiscal year ended March 31, 2021 are incorporated herein by reference in Part III of this Annual Report on Form 10-K where indicated.