Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 27, 2025	Sep. 28, 2024
Income Statement [Abstract]
Revenues	$ 500,666	$ 479,440	$ 1,447,947	$ 1,365,903
Costs and expenses:
Operating	321,065	300,535	938,318	881,620
Selling	86,813	84,319	253,769	235,806
General and administrative	37,309	36,956	116,945	112,817
Depreciation and amortization	19,969	17,860	57,870	51,639
Gain on sale of assets, net	(2,008)	(1,190)	(4,023)	(3,651)
Total costs and expenses	463,148	438,480	1,362,879	1,278,231
Income from operations	37,518	40,960	85,068	87,672
Other income (expense):
Interest expense	(5,066)	(5,319)	(14,428)	(14,608)
Interest income	568	970	1,876	2,494
Other, net	(2,041)	(1,111)	(3,333)	(4,644)
Income before income taxes	30,979	35,500	69,183	70,914
Income taxes	9,365	9,476	18,057	17,445
Net income	$ 21,614	$ 26,024	$ 51,126	$ 53,469
Net income per share:
Net income per share, basic	$ 0.53	$ 0.63	$ 1.24	$ 1.27
Net income per share, diluted	$ 0.52	$ 0.60	$ 1.20	$ 1.21
Weighted-average shares outstanding:
Weighted-average shares outstanding, basic	40,569,000	41,629,000	41,216,000	42,209,000
Weighted-average shares outstanding, diluted	41,893,000	43,302,000	42,719,000	44,059,000