Stockholders' Equity - Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 26, 2021
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 1,599,972	$ 1,540,725	$ 1,328,111
Other comprehensive income/(loss) before reclassifications, before tax	455
Amounts reclassified from accumulated other comprehensive loss, before tax	6,276
Income tax expense/(benefit)	1,746	9,177	9,918
Net current-period other comprehensive (loss)/income, net of tax	4,985	25,355	26,979
Ending balance	1,763,219	1,599,972	1,540,725
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(510)
Other comprehensive income/(loss) before reclassifications, before tax	1,885
Amounts reclassified from accumulated other comprehensive loss, before tax	0
Income tax expense/(benefit)	465
Net current-period other comprehensive (loss)/income, net of tax	1,420
Ending balance	910	(510)
Funded Status of Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(348,947)
Other comprehensive income/(loss) before reclassifications, before tax	(12,184)
Amounts reclassified from accumulated other comprehensive loss, before tax	6,276
Income tax expense/(benefit)	(1,569)
Net current-period other comprehensive (loss)/income, net of tax	(4,339)
Ending balance	(353,286)	(348,947)
Net Unrealized Gain on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(8,390)
Other comprehensive income/(loss) before reclassifications, before tax	10,754
Amounts reclassified from accumulated other comprehensive loss, before tax	0
Income tax expense/(benefit)	2,850
Net current-period other comprehensive (loss)/income, net of tax	7,904
Ending balance	(486)	(8,390)
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(357,847)	(383,202)	(410,181)
Net current-period other comprehensive (loss)/income, net of tax	4,985	25,355	26,979
Ending balance	$ (352,862)	$ (357,847)	$ (383,202)