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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)

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- 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 + Details
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- Definition 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. + References No definition available. + Details
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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 + Details
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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 + Details
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