Long-Term Indebtedness (Details) - USD ($) $ in Thousands	3 Months Ended
Feb. 29, 2020	Aug. 31, 2019
Debt Instrument [Line Items]
Total Senior Indebtedness	$ 287,559	$ 462,559
Less: Current maturities of long-term debt	0	(7,500)
Deferred Finance Costs, Own-share Lending Arrangement, Issuance Costs, Net	(1,192)	(2,114)
Long-term debt, net	286,367	452,945
Line of Credit
Debt Instrument [Line Items]
Total Senior Indebtedness	0	175,000
Line of Credit \| Senior Credit Facility - Revolver
Debt Instrument [Line Items]
Total Senior Indebtedness	0	0
Line of Credit \| Senior Credit Facility - Term Loan
Debt Instrument [Line Items]
Total Senior Indebtedness	0	175,000
Senior Notes \| 5.625% Senior Notes
Debt Instrument [Line Items]
Senior Notes, Noncurrent	$ 287,559	$ 287,559
Minimum
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.15%
Minimum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.125%
Minimum \| Base Rate
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Maximum
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.30%
Maximum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.00%
Maximum \| Base Rate
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.25%

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

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