Leases - Operating Lease Cost and Additional Lease Information (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Nov. 30, 2019 USD ($)	Nov. 30, 2019 USD ($)
Leases [Abstract]
Operating lease costs	$ 17,700	$ 34,900
Other information related to operating leases
Cash paid for amounts included in the measurement of operating lease liabilities		24,927
Operating lease right-of-use assets obtained in exchange for new operating lease liabilities		$ 24,770
Weighted-average remaining lease term - operating leases	5 years 4 months 6 days	5 years 4 months 6 days
Weighted-average discount rate - operating leases	2.71%	2.71%