Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	Oct. 01, 2019	Mar. 31, 2020	Sep. 30, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liabilities		$ 525,958
Right-of-use assets		484,933
Property and equipment, net		(1,421,768)	$ (1,770,516)
Long-term financing obligation		$ 0	$ (320,518)
ASC 842
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liabilities	$ 562,100
Right-of-use assets	526,281
Net of tax cumulative adjustment to retained earnings	35,100
Cumulative adjustment to retained earnings, tax	9,600
Property and equipment, net	266,000
Long-term financing obligation	$ 324,800