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Goodwill and other intangible assets - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Line Items]          
Amortization Of Intangible Assets $ 734,000 $ 795,000 $ 1,529,000 $ 1,590,000  
Goodwill increase decrease 0 $ 0 0 $ 0  
Goodwill $ 804,428,000   $ 804,428,000   $ 804,428,000