Leases - Lessee Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2023
Lease assets:
Operating lease right-of-use assets	$ 227,810	$ 226,602	$ 231,103
Financing lease assets	$ 1,340	$ 1,559	$ 2,124
Finance Lease, Other Assets, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent	Other Assets, Noncurrent
Total lease assets	$ 229,150	$ 228,161	$ 233,227
Current:
Operating lease liabilities	57,900	58,998	57,980
Financing lease liabilities	$ 556	$ 570	$ 572
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accounts payable, accrued expenses and other current liabilities	Accounts payable, accrued expenses and other current liabilities	Accounts payable, accrued expenses and other current liabilities
Total current lease liabilities	$ 58,456	$ 59,568	$ 58,552
Non-current:
Operating lease liabilities	182,228	180,616	188,475
Financing lease liabilities	$ 907	$ 1,110	$ 1,644
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Total non-current lease liabilities	$ 183,135	$ 181,726	$ 190,119
Total lease liabilities	$ 241,591	$ 241,294	$ 248,671