Capitalization (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
Dec. 31, 2022	Sep. 30, 2022
Debt Instrument [Line Items]
Common stock shares issued due to SARs exercises	12,055
Shares tendered	102,761
Current Portion of Long-Term Debt	$ 399,000	$ 549,000
364-Day Credit Agreement
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	250,000
Committed Credit Facility Amount Drawn	250,000
3.75% Notes Due March 2023 [Member]
Debt Instrument [Line Items]
Debt instrument redeemed	150,000
Current Portion of Long-Term Debt	$ 350,000	$ 500,000
Long-term debt, interest rate	3.75%	3.75%
7.395% Notes Due March 2023 [Member]
Debt Instrument [Line Items]
Current Portion of Long-Term Debt	$ 49,000	$ 49,000
Long-term debt, interest rate	7.395%	7.395%
Restricted Stock Units [Member]
Debt Instrument [Line Items]
Common stock issued	113,531
Performance Shares [Member]
Debt Instrument [Line Items]
Common stock issued	278,687
Board Of Directors [Member]
Debt Instrument [Line Items]
Common stock issued	7,230

Contractual interest rate for funds borrowed, under the debt agreement.

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