UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF PARTNERS’ DEFICIT - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2021	Sep. 27, 2020	Sep. 26, 2021	Sep. 27, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, value	$ (841,560)	$ (411,862)	$ (666,437)	$ (9,966)
Net income (loss)	147,987	(136,261)	(21,299)	(484,790)
Partnership distribution declared		2		(53,020)
Limited partnership units related to equity-based compensation	3,096	1,612	7,597	(6,354)
Tax effect of units involved in treasury unit transactions	(80)	(1)	(1,641)	(1,762)
Foreign currency translation adjustment	7,912	(4,820)	(865)	4,562
Ending balance, value	$ (682,645)	$ (551,330)	$ (682,645)	$ (551,330)
Limited Partners
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, units (in shares)	56,829	56,707	56,706	56,666
Beginning balance, value	$ (840,663)	$ (436,275)	$ (674,319)	$ (25,001)
Net income (loss)	$ 147,985	(136,260)	$ (21,299)	(484,785)
Partnership distribution declared		$ 2		$ (53,020)
Limited partnership units related to equity-based compensation (in shares)	13	(1)	136	40
Limited partnership units related to equity-based compensation	$ 3,096	$ 1,612	$ 7,597	$ (6,354)
Tax effect of units involved in treasury unit transactions	$ (80)	$ (1)	$ (1,641)	$ (1,762)
Ending balance, units (in shares)	56,842	56,706	56,842	56,706
Ending balance, value	$ (689,662)	$ (570,922)	$ (689,662)	$ (570,922)
General Partner’s Deficit
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, value	(9)	(5)	(7)	(1)
Net income (loss)	2	(1)	0	(5)
Ending balance, value	(7)	(6)	(7)	(6)
Special L.P. Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, value	5,290	5,290	5,290	5,290
Ending balance, value	5,290	5,290	5,290	5,290
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, value	(6,178)	19,128	2,599	9,746
Foreign currency translation adjustment	7,912	(4,820)	(865)	4,562
Ending balance, value	$ 1,734	$ 14,308	$ 1,734	$ 14,308