Leases, Future Lease Obligations Prior to Adoption of ASU 2016-02 (Details) $ in Thousands	Aug. 31, 2019 USD ($)
Capital lease obligations
Total	$ 41,331
2020	13,104
2021	10,004
2022	7,758
2023	5,831
2024	3,904
Thereafter	730
Long-term non-cancelable operating leases
Total	124,817
2020	34,511
2021	27,383
2022	22,074
2023	17,433
2024	10,478
Thereafter	$ 12,938