Leases - Lessee Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Lease assets:
Operating lease right-of-use assets	$ 231,103	$ 234,388	$ 229,991
Financing lease assets	2,124	2,178	563
Total lease assets	233,227	236,566	230,554
Current:
Operating lease liabilities	57,980	57,182	52,799
Financing lease liabilities	572	530	121
Total current lease liabilities	58,552	57,712	52,920
Non-current:
Operating lease liabilities	188,475	193,187	188,730
Financing lease liabilities	1,644	1,715	447
Total non-current lease liabilities	190,119	194,902	189,177
Total lease liabilities	$ 248,671	$ 252,614	$ 242,097
Finance Lease, Other Assets, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent	Other Assets, Noncurrent
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
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent