v3.26.3
Investments - Narrative (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
security
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
security
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
security
Investments available for sale          
Number of investment securities in an unrealized loss position | security 2,837   2,837   1,763
Allowance for credit loss $ 1,400   $ 1,400    
Impairment loss 1,430 $ 40 1,430 $ 40  
Other invested assets 451,948   451,948   $ 382,513
Fair value of investments deposited with insurance regulatory authorities 9,000   9,000   8,700
Essent Re          
Investments available for sale          
Fair value of the required investments on deposit in trusts 1,000,000   1,000,000   1,000,000
Essent Guaranty Inc          
Investments available for sale          
Assets on deposit for the benefit of the sponsor 5,300   5,300   5,200
Limited Partnership Investment          
Investments available for sale          
Other assets, fair value $ 215,800   215,800   $ 180,000
Investment company, committed capital     $ 113,600    
Limited Partnership Investment | Minimum          
Investments available for sale          
Investment company, asset liquidation period     1 year    
Limited Partnership Investment | Maximum          
Investments available for sale          
Investment company, asset liquidation period     9 years    
Securities | Credit Concentration Risk | Internal Investment Grade          
Investments available for sale          
Concentration risk, percentage     99.00%