Investments in and Acquisitions of Businesses - Schedule of unaudited pro forma combined financial information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 24, 2023	Jun. 25, 2022	Jun. 24, 2023	Jun. 25, 2022
Business Acquisition [Line Items]
Total Revenues	$ 278,628	$ 300,332	$ 1,202,599	$ 1,263,834
Net income	(5,261)	(2,535)	144,610	193,865
Pro Forma [Member]
Business Acquisition [Line Items]
Revenues	278,628	306,326	1,206,529	1,277,522
Net (loss) income	$ (5,261)	$ (4,962)	$ 134,531	$ 176,494