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Financial instruments - Narrative (Details)			3 Months Ended
	Oct. 28, 2022 USD ($)	Jul. 11, 2022 USD ($)	Apr. 01, 2023 USD ($) derivative	Apr. 02, 2022 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Oct. 29, 2021 USD ($)	Dec. 06, 2019 USD ($)
Debt Instrument [Line Items]
Borrowing on revolver			$ 49,000,000	$ 15,000,000
Deferred financing costs			1,251,000			$ 1,338,000
Original issue discount			$ 2,876,000			1,308,000
Interest Rate Swap
Debt Instrument [Line Items]
Number of interest rate swap agreements | derivative			1
Received settlement	$ 7,738,000
Interest income, net				3,924,000
Term Loan | Level 2
Debt Instrument [Line Items]
Long-term debt, fair value			$ 414,402,000
Secured Debt
Debt Instrument [Line Items]
Debt instrument, covenant, liquidity, minimum					$ 10,000,000
Line of Credit
Debt Instrument [Line Items]
Gain (loss) on debt retirement			0
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility, borrowing capacity								$ 50,000,000
Outstanding borrowings on line of credit			29,000,000			0
Line of Credit | Secured Debt
Debt Instrument [Line Items]
Debt instrument, face amount								$ 200,000,000
Line of Credit | Secured Debt | Term Loan Facility, July 2022
Debt Instrument [Line Items]
Borrowing on revolver		$ 80,000,000
Deferred financing costs			2,044,000
Debt issuance costs, gross			3,661,000
Amortization of debt issuance costs			1,617,000
Line of Credit | Secured Debt | Term Loan Facilities
Debt Instrument [Line Items]
Deferred financing costs						1,251,000
Long-term debt						416,585,000
Original issue discount						$ 2,876,000
Interest expense, debt			$ 223,000	$ 203,000
Line of Credit | Secured Debt | Term Loan
Debt Instrument [Line Items]
Debt instrument, face amount							$ 360,750,000

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Face (par) amount of debt instrument at time of issuance.

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The number of derivative instruments of a particular group held by the entity.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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