Benefit Plans - Components of Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2021	Dec. 26, 2020	Dec. 28, 2019
Components of net periodic benefit cost (income) [Abstract]
Settlement charge	$ 0	$ 11,642	$ 0
Net periodic benefit (income) cost	(1,903)	(3,013)	(465)
Pension Benefits
Components of net periodic benefit cost (income) [Abstract]
Interest cost	1,272	3,260	5,972
Expected return on plan assets	(3,671)	(5,704)	(8,103)
Amortization of net loss (gain)	1,536	2,305	1,950
Settlement charge	0	11,642	0
Service cost	0	0
Net periodic benefit (income) cost	(863)	11,503	(181)
Other Benefits
Components of net periodic benefit cost (income) [Abstract]
Interest cost	281	430	609
Amortization of net loss (gain)	(103)	(193)	(88)
Settlement charge	0	0	(2)
Service cost	258	212	260
Amortization of prior service credit	(470)	(519)	(902)
Curtailment gain	0	(2,591)	0
Net periodic benefit (income) cost	$ (34)	$ (2,661)	$ (123)