Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Sep. 30, 2023	Mar. 25, 2023	Apr. 30, 2021	Oct. 31, 2020	Dec. 31, 2017	Dec. 14, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of senior subordinated notes	$ 1,189,277	$ 1,188,203	$ 1,212,323
Senior notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of senior subordinated notes	$ 1,188,713	1,187,769	1,186,826
Senior notes \| Senior notes, interest at 4.125%, payable semi-annually, principal due April 2031
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, aggregate principal amount				$ 400,000
Interest rate	4.125%			4.125%
Estimated fair value of senior notes	$ 352,400	327,100	334,000
Carrying value of senior subordinated notes	$ 395,700	395,400	395,100
Senior notes \| Senior notes, interest at 4.125%, payable semi-annually, principal due October 2030
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, aggregate principal amount					$ 500,000
Interest rate	4.125%				4.125%
Estimated fair value of senior notes	$ 448,000	417,000	426,300
Carrying value of senior subordinated notes	$ 494,800	494,400	494,000
Senior notes \| Senior notes, interest at 5.125%, payable semi-annually, principal due February 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, aggregate principal amount						$ 300,000	$ 300,000
Interest rate	5.125%					5.125%	5.125%
Estimated fair value of senior notes	$ 291,100	279,500	281,900
Carrying value of senior subordinated notes	$ 298,200	$ 298,000	$ 297,700