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Credit Facilities and Short-term Borrowings (Narrative) (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2018 | Jun. 30, 2018 | Sep. 30, 2017
Debt And Line Of Credit Facility [Line Items] |  |  |
Debt financing costs |  | $ 1,325,000 |
Foreign Lines of Credit And Overdraft Facilities [Member] |  |  |
Debt And Line Of Credit Facility [Line Items] |  |  |
Outstanding borrowings |  | 3,769,000 | $ 0
Revolving Credit Agreement [Member] |  |  |
Debt And Line Of Credit Facility [Line Items] |  |  |
Maximum borrowing capacity |  | 1,000,000,000 |
Option to increase maximum borrowings to this amount |  | $ 1,200,000,000 |
Line of Credit Facility, Expiration Date |  | Apr. 01, 2020 |
Variable Rate Basis | LIBOR |  |
Credit facility effective interest rate on outstanding borrowing |  | 2.87% | 2.29%
Outstanding borrowings |  | $ 374,574,000 | $ 32,600,000
Current portion of outstanding borrowings |  | $ 140,231,000 | $ 32,600,000
Minimum [Member] | Revolving Credit Agreement [Member] |  |  |
Debt And Line Of Credit Facility [Line Items] |  |  |
Basis Spread On Variable Rate |  | 0.85% |
Maximum [Member] | Revolving Credit Agreement [Member] |  |  |
Debt And Line Of Credit Facility [Line Items] |  |  |
Basis Spread On Variable Rate |  | 1.65% |

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- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Fair value of the amount outstanding under the credit facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The current portion of the amount outstanding under the credit facility. Amount is expected to be repaid in one year or the normal operating cycle, if longer. + References No definition available. + Details
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