XML 8 R1.htm IDEA: XBRL DOCUMENT v3.25.3
Document And Entity Information - shares
 9 Months Ended
Sep. 30, 2025
Nov. 03, 2025
Document Information [Line Items]    
Entity Central Index Key 0001761312  
Entity Registrant Name Palomar Holdings, Inc.  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2025  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2025  
Document Transition Report false  
Entity File Number 001-38873  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 83-3972551  
Entity Address, Address Line One 7979 Ivanhoe Avenue, Suite 500  
Entity Address, City or Town La Jolla  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 92037  
City Area Code 619  
Local Phone Number 567-5290  
Title of 12(b) Security Common Stock, par value $0.0001 per share  
Trading Symbol PLMR  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   26,501,692