v3.26.1
Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Income Tax Disclosure [Line Items]        
Provision for income taxes $ 5,713 $ 5,045 $ 15,802 $ 12,071
Non-cash deferred tax benefit 2,661 $ 2,644 7,184 $ 5,637
Outside Kiniksa US, UK, and Switzerland        
Income Tax Disclosure [Line Items]        
Material deferred tax assets $ 0   $ 0