Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 25, 2021

Accounting Policies [Abstract]

Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis

Financial assets and liabilities measured at fair value on a recurring basis as of September 25, 2021 and December 26, 2020 are summarized as follows:

Items Measured at Fair Value at September 25, 2021
(in thousands)	Level 1		Level 2		Total
Mutual fund investments held in rabbi trust	$	983	$	—	$	983
Foreign currency derivative liabilities not designated as hedging instruments	$	—	$	509	$	509

Items Measured at Fair Value at December 26, 2020
(in thousands)	Level 1		Level 2		Total
Mutual fund investments held in rabbi trust	$	704	$	—	$	704
Foreign currency derivative assets not designated as hedging instruments	—		227		227
Total assets measured at fair value on a recurring basis	$	704	$	227	$	931
Interest rate swap liabilities designated as hedging instruments	$	—	$	9,561	$	9,561
Cross currency swap liabilities not designated as hedging instruments	—		12,197		12,197
Total derivative liabilities	$	—	$	21,758	$	21,758

Schedule of Carrying Values and Estimated Fair Value of Total Long-Term Debt

The carrying value and estimated fair value of total long-term debt were as follows:

	September 25, 2021				December 26, 2020
(in thousands)	Carrying value		Estimated fair value		Carrying value		Estimated fair value
Long-term debt	$	1,695,679	$	1,754,963	$	2,125,207	$	2,169,597

Schedule of Accumulated Other Comprehensive Income (Loss)

The following tables present changes in each component of accumulated other comprehensive income (loss), net of tax.

	Three months ended September 25, 2021
(in thousands)	Foreign currency translation adjustment		Cash flow hedges		Defined benefit pension plan		Accumulated other comprehensive income (loss)
Balance at June 26, 2021	$	19,002	$	(57)	$	(91)	$	18,854
Net change	(30,903)		(1)		3		(30,901)
Balance at September 25, 2021	$	(11,901)	$	(58)	$	(88)	$	(12,047)

	Three months ended September 26, 2020
(in thousands)	Foreign currency translation adjustment		Cash flow hedges		Defined benefit pension plan		Accumulated other comprehensive income (loss)
Balance at June 27, 2020	$	(7,489)	$	—	$	—	$	(7,489)
Net change	(2,981)		552		—		(2,429)
Balance at September 26, 2020	$	(10,470)	$	552	$	—	$	(9,918)

	Nine months ended September 25, 2021
(in thousands)	Foreign currency translation adjustment		Cash flow hedges		Defined benefit pension plan		Accumulated other comprehensive income (loss)
Balance at December 26, 2020	$	16,834	$	(87)	$	(219)	$	16,528
Net change	(28,735)		29		131		(28,575)
Balance at September 25, 2021	$	(11,901)	$	(58)	$	(88)	$	(12,047)

	Nine months ended September 26, 2020
(in thousands)	Foreign currency translation adjustment		Cash flow hedges		Defined benefit pension plan		Accumulated other comprehensive income (loss)
Balance at December 28, 2019	$	3,626	$	—	$	—	$	3,626
Net change	(14,096)		552		—		(13,544)
Balance at September 26, 2020	$	(10,470)	$	552	$	—	$	(9,918)