v3.10.0.1
Document and Entity Information - shares
9 Months Ended
Dec. 31, 2018
Feb. 01, 2019
Document and Entity Information [Abstract]    
Entity Registrant Name Prestige Consumer Healthcare Inc.  
Entity Central Index Key 0001295947  
Current Fiscal Year End Date --03-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Dec. 31, 2018  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   51,798,384
Entity Emerging Growth Company false  
Entity Small Business false