Summary of Significant Accounting Policies Recently Issued Accounting Standards (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Dec. 18, 2020	Jul. 31, 2020	Jan. 31, 2020
Long-term Debt	$ 2,992,157		$ 2,444,248	$ 1,866,566
Operating Lease, Right-of-Use Asset	215,377		225,744	227,394
Operating Lease, Liability, Noncurrent	210,855		217,542	228,474
Operating Lease, Liability, Current	36,878		36,604	35,650
Interest Rate Cash Flow Hedge Liability at Fair Value	16,548		22,510	4,563
Debt Instrument, Face Amount		$ 575,000
EPR Secured Notes [Member]
Long-term Debt	114,162		114,162	114,162
Notes and Loans Payable	136,512
Debt Instrument, Fair Value Disclosure	181,810
EB-5 Development Notes [Member]
Long-term Debt	51,500		51,500	51,500
Notes and Loans Payable	49,127
Debt Instrument, Fair Value Disclosure	50,277
6.25% Notes [Member]
Long-term Debt	600,000		$ 600,000	$ 0
Debt Instrument, Fair Value Disclosure	639,984
0.0% Convertible Notes
Long-term Debt	467,758
Debt Instrument, Fair Value Disclosure	$ 580,762