Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Fair Value Measurements Additional Information (Details) - USD ($) $ in Thousands	Feb. 28, 2021	May 31, 2020	Jul. 15, 2014
Windset
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment ownership percentage	26.90%		26.90%
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets held for sale - nonrecurring	$ 0	$ 0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets held for sale - nonrecurring	$ 0	$ 2,607