Document and Entity Information - shares
9 Months Ended
Jun. 30, 2019
Jul. 26, 2019
Document and Entity Information [Abstract]    
Entity Registrant Name BEAZER HOMES USA INC  
Entity Central Index Key 0000915840  
Document Type 10-Q  
Document Period End Date Jun. 30, 2019  
Amendment Flag false  
Entity Small Business false  
Entity Emerging Growth Company false  
Document Fiscal Year Focus 2019  
Entity Shell Company false  
Entity Current Reporting Status Yes  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --09-30  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   30,954,813