v3.26.1
Employee benefit plans - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 01, 2018
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Deferred compensation plan liability   $ 85,916   $ 85,916   $ 74,820
Cash surrender value of policies   86,670   86,670   $ 75,586
Change in fair value of plan assets   8,788 $ 5,603 7,351 $ 4,462  
Change in fair value of deferred compensation liabilities   $ 8,776 $ 5,595 $ 7,348 $ 4,463  
U.S.            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Vesting percentage of participants (in percentage) 100.00%          
Employer discretionary vesting period 2 years          
Earnings receivable minimum term 2 years          
Earnings receivable lump sum or annual installment maximum terms 15 years          
Deferred compensation arrangement with individual, maximum re-deferral contractual term 10 years          
U.S. | One-Year Anniversary of Approval of Contribution            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Employer discretionary vesting percentage (in percentage) 50.00%          
U.S. | Two-Year Anniversary of Approval of Contribution            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Employer discretionary vesting percentage (in percentage) 50.00%          
Minimum | U.S.            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Individual qualifying base compensation (in percentage) 1.00%          
Individual qualifying bonus compensation (in percentage) 1.00%          
Maximum | U.S.            
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]            
Individual qualifying base compensation (in percentage) 80.00%          
Individual qualifying bonus compensation (in percentage) 100.00%