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Derivative Instruments and Hedging Activities (Impact of Derivative Instruments on Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Income) Expense Recognized in Earnings on Derivative	$ 4,955	$ (18)	$ 4,919	$ (54)
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	(23,658)		(23,658)
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	4,955	(18)	4,919	(54)
Fixed-Rate Cross Currency Interest Rate Contract [Member] | Selling, General and Administrative Expenses [Member] | Derivatives in Cash Flow Hedging Relationships [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Income) Expense Recognized in Earnings on Derivative	3,506		3,506
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	(21,823)		(21,823)
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	3,506		3,506
Floating-Rate Cross Currency Interest Rate Contract [Member] | Selling, General and Administrative Expenses [Member] | Derivatives in Fair Value Hedging Relationships [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Income) Expense Recognized in Earnings on Derivative	1,467		1,467
Amount of (Gain) Loss Recognized in Accumulated OCI on Derivative	(1,835)		(1,835)
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	1,467		1,467
Treasury Lock [Member] | Interest Expense [Member] | Derivatives in Cash Flow Hedging Relationships [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Income) Expense Recognized in Earnings on Derivative	(18)	(18)	(54)	(54)
Amount of (Gain) Loss Reclassified from Accumulated OCI into Earnings	$ (18)	$ (18)	$ (54)	$ (54)

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (a),(c),(d),(e)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

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- Definition

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624177-113959

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- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

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