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Cover
Mar. 02, 2020
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Mar. 02, 2020
Entity File Number 001-16533
Entity Registrant Name ProAssurance Corporation
Entity Central Index Key 0001127703
Entity Tax Identification Number 63-1261433
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 100 Brookwood Place
Entity Address, City or Town Birmingham
Entity Address, State or Province AL
Entity Address, Postal Zip Code 35209
City Area Code 205
Local Phone Number 877-4400
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $0.01 per share
Trading Symbol PRA
Security Exchange Name NYSE
Entity Emerging Growth Company false