Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 25, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 23,181	$ 9,013
Other comprehensive income (loss), net of tax:
Minimum pension liability adjustment, net of tax of $10 and $6, respectively	30	17
Changes in the fair value of cash flow derivatives, net of tax of $763 and $(11,795), respectively	2,215	(32,928)
Reclassification of cash flow derivatives to interest expense, net of tax of $255 and $86, respectively	740	239
Amortization of unrealized losses related to dedesignated derivatives to interest expense, net of tax of $31 and $0, respectively	90	0
Other comprehensive income (loss)	3,075	(32,672)
Total comprehensive income (loss)	$ 26,256	$ (23,659)