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Long-term debt - Narrative (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 08, 2023
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Jul. 29, 2021
USD ($)
Debt Instrument [Line Items]              
Existing term loans outstanding   $ 176,494   $ 176,494   $ 183,070  
Interest expense   3,800 $ 2,400 10,900 $ 5,400    
Amortization of deferred debt issuance costs   200 200 597 626    
Accrued interest   3,700   3,700   $ 3,000  
Revolving Credit Facility              
Debt Instrument [Line Items]              
Interest expense   200 $ 200 500 $ 500    
Available credit under agreement   $ 45,000   $ 45,000      
Revolving Credit Facility | Minimum              
Debt Instrument [Line Items]              
Commitment fee percentage       0.25%      
Revolving Credit Facility | Maximum              
Debt Instrument [Line Items]              
Commitment fee percentage       0.50%      
2021 Credit Facilities              
Debt Instrument [Line Items]              
Quarterly amortization rate             1.25%
2021 Credit Facilities | Secured Overnight Financing Rate (SOFR)              
Debt Instrument [Line Items]              
Interest rate adjustment 0.0010            
Variable rate floor 0.0000            
2021 Credit Facilities | Minimum | Secured Overnight Financing Rate (SOFR)              
Debt Instrument [Line Items]              
Interest rate spread 2.00%            
2021 Credit Facilities | Minimum | Base Rate              
Debt Instrument [Line Items]              
Interest rate spread 1.00%            
2021 Credit Facilities | Maximum | Secured Overnight Financing Rate (SOFR)              
Debt Instrument [Line Items]              
Interest rate spread 2.75%            
2021 Credit Facilities | Maximum | Base Rate              
Debt Instrument [Line Items]              
Interest rate spread 1.75%            
2021 Credit Facilities | Term loan              
Debt Instrument [Line Items]              
Aggregate principal amount             $ 190,000
2021 Credit Facilities | Revolving Credit Facility | Line of credit              
Debt Instrument [Line Items]              
Revolving line of credit             50,000
2020 Credit Facilities | Term loan              
Debt Instrument [Line Items]              
Existing term loans outstanding             $ 186,400