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Debt (Schedule Of Short-term And Long-term Borrowings) (Details) - USD ($)
$ in Thousands

3 Months Ended

Nov. 30, 2020

Sep. 30, 2020

Aug. 31, 2020

Debt Instrument [Line Items]

Total Borrowings

$ 115,512

$ 113,898

Short-term portion of borrowings

(800)

(800)

Long-term borrowings

$ 114,712

113,098

Line of credit

$ 50,000

Series A Notes [Member]

Debt Instrument [Line Items]

Issuance

^[1]

Nov. 15, 2017

Maturity date

May 15, 2032

Interest rate

3.39%

Total Borrowings

^[1]

$ 17,600

18,000

Principal payment frequency of periodic payment

semi-annually

Periodic payment amount

$ 400

Series A Notes, Due November 15, 2032 [Member]

Debt Instrument [Line Items]

Maturity date

Nov. 15, 2032

Remaining principal payment

$ 8,400

Series B Notes [Member]

Debt Instrument [Line Items]

Issuance

^[2]

Sep. 30, 2020

Maturity date

^[2]

Nov. 15, 2027

Interest rate

2.50%

Total Borrowings

^[2]

$ 26,000

Series C Notes [Member]

Debt Instrument [Line Items]

Issuance

^[2]

Sep. 30, 2020

Maturity date

^[2]

Nov. 15, 2030

Interest rate

2.69%

Total Borrowings

^[2]

$ 26,000

Series B And C Notes [Member]

Debt Instrument [Line Items]

Total Borrowings

$ 26,000

Principal payment frequency of periodic payment

semi-annually

Date of first interest payment

May 2021

Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Maturity date

^[2],[3]

Sep. 30, 2025

Total Borrowings

^[2],[3]

$ 45,912

$ 95,898

Minimum [Member] | Series A Notes [Member]

Debt Instrument [Line Items]

Maturity year

2021

Maximum [Member] | Series A Notes [Member]

Debt Instrument [Line Items]

Maturity year

2032

[1]	Principal payments are required semi-annually in May and November of each year in equal installments of $0.4 million through May 15, 2032. The remaining outstanding principal in the amount of $8.4 million will become due on November 15, 2032.
[2]	On September 30, 2020, the Company refinanced $50.0 million of existing draws under its Credit Agreement in the United States through the issuance of two new $26.0 million notes (“Series B Notes” and “Series C Notes”, respectively) under its Note Agreement. Interest on these new notes is payable semi-annually in May and November of each year with no principle due until the maturity date. The first interest payment on both the Series B and Series C Notes is due in May 2021.
[3]	The Company has the ability to refinance any draw under the line of credit with successive short-term borrowings through the maturity date. Outstanding draws for which management has both the ability and intent to refinance with successive short-term borrowings for a period of at least twelve months are classified as long-term. As of November 30, 2020, the entire balance on this facility is classified as long-term and only contains amounts denominated in Euros and Pound Sterling. Euro and Pound Sterling denominated draws will fluctuate in U.S. Dollars from period to period due to changes in foreign currency exchange rates.

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