Financial Assets and Liabilities that are Measured At Fair Value and are Categorized Using Fair Value Hierarchy (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 27, 2025	Dec. 28, 2024
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	$ 35,969	$ 53,228
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	(21,593)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases	4,698
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	(364)
Fair Value, Measurements, Recurring \| Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial Assets	14,572	29,952
Fair Value, Measurements, Recurring \| Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial Liabilities	35,969	53,228
Fair Value, Measurements, Recurring \| Foreign Exchange Forward
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial Liabilities	414	1,400
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Measurements, Recurring \| Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial Assets	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Measurements, Recurring \| Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial Liabilities	0	0
Fair Value, Inputs, Level 1 [Member] \| Fair Value, Measurements, Recurring \| Foreign Exchange Forward
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial Liabilities	0	0
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Measurements, Recurring \| Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial Assets	14,572	29,952
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Measurements, Recurring \| Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial Liabilities	0	0
Fair Value, Inputs, Level 2 [Member] \| Fair Value, Measurements, Recurring \| Foreign Exchange Forward
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial Liabilities	414	1,400
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Measurements, Recurring \| Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial Assets	0	0
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Measurements, Recurring \| Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial Liabilities	35,969	53,228
Fair Value, Inputs, Level 3 [Member] \| Fair Value, Measurements, Recurring \| Foreign Exchange Forward
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Financial Liabilities	$ 0	$ 0

MIDDLEBY Corp 10-Q