Leases, Maturity of Lease Liabilities (Details) - USD ($) $ in Thousands	Aug. 31, 2021	Aug. 31, 2020
Operating Leases
2022	$ 31,555
2023	26,726
2024	21,040
2025	16,308
2026	12,106
Thereafter	30,826
Total lease payments	138,561
Less imputed interest	18,719
Total operating lease liabilities	119,842	$ 123,414
Finance Leases
2022	17,853
2023	15,632
2024	12,859
2025	7,256
2026	1,854
Thereafter	615
Total lease payments	56,069
Less imputed interest	3,925
Total finance lease liabilities	$ 52,144	$ 50,224