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Document And Entity Information - USD ($)
Oct. 31, 2020
Dec. 11, 2020
Apr. 30, 2020
Document Information [Line Items]      
Entity, Registrant Name Hovnanian Enterprises, Inc.    
Document, Type 10-K/A    
Document, Annual Report true    
Document, Period End Date Oct. 31, 2020    
Document, Transition Report false    
Entity, File Number 1-8551    
Entity, Incorporation, State or Country Code DE    
Entity, Tax Identification Number 22-1851059    
Entity, Address, Address Line One 90 Matawan Road    
Entity, Address, Address Line Two Fifth Floor    
Entity, Address, City or Town Matawan    
Entity, Address, State or Province NJ    
Entity, Address, Postal Zip Code 07747    
City Area Code 732    
Local Phone Number 747-7800    
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 false    
Entity, Emerging Growth Company false    
Entity, Shell Company false    
Entity, Public Float     $ 64,080,000
Current Fiscal Year End Date --10-31    
Document, Fiscal Year Focus 2020    
Document, Fiscal Period Focus FY    
Amendment Description This Amendment No. 2 on Form 10-K/A (“Amendment No. 2”) amends the Annual Report on Form 10-K for the year ended October 31, 2020 of Hovnanian Enterprises, Inc. (“HEI”), which HEI filed with the Securities and Exchange Commission (“SEC”) on December 22, 2020 and which was amended by Amendment No. 1 filed with the SEC on December 23, 2020 (as amended by Amendment No. 1, the “Original Form 10-K”). HEI is filing this Amendment No. 2 to amend Item 15 of the Original Form 10-K to include the consolidated financial statements and the related reports of the independent auditors of its equity method investees, Port Imperial Partners, LLC and Hovsite Holdings III LLC, as of and for the years ended December 31, 2020, 2019 and 2018 (the “financial statements”), in accordance with Rule 3-09 of Regulation S-X, and also to include the related consents of independent auditors. The financial statements were not included in the Original Form 10-K because Port Imperial Partners, LLC’s and Hovsite Holdings III LLC’s fiscal years ended on December 31, 2020, which was after the date of the filing of the Original Form 10-K.     
Amendment Flag true    
Entity, Central Index Key 0000357294    
ClassACommonStock Custom [Member]      
Document Information [Line Items]      
Title of 12(b) Security Class A Common Stock    
Trading Symbol HOV    
Security Exchange Name NYSE    
Entity, Common Stock Shares, Outstanding   5,520,359  
PreferredStockPurchaseRights Custom [Member]      
Document Information [Line Items]      
Title of 12(b) Security Preferred Stock Purchase Rights    
Trading Symbol N/A    
Security Exchange Name NYSE    
DepositaryShares Custom [Member]      
Document Information [Line Items]      
Title of 12(b) Security Depositary Shares    
Trading Symbol HOVNP    
Security Exchange Name NASDAQ    
ClassBCommonStock Custom [Member]      
Document Information [Line Items]      
Entity, Common Stock Shares, Outstanding   622,201