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Credit Facilities, Short-term Borrowings and Long-term Debt (Tables) | 3 Months Ended
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Dec. 31, 2016
Debt Disclosure |
Schedule of Long-term Debt |
﻿ |  |  |  |  |  |
﻿ |  |  |  |  |  |
﻿ |  | December 31, |  | September 30,
﻿ |  | 2016 |  | 2016
﻿Revolving credit facility - Floating rate (LIBOR plus 0.85% - 1.65%), due April 2020, unsecured |  | $ | 160,550 |  | $ | 156,700
﻿Series D notes – 6.39%, due October 2018; unsecured |  |  | 100,000 |  |  | 100,000
﻿Series F notes – 8.24%, due April 2019; unsecured |  |  | 43,000 |  |  | 43,000
﻿Series G notes – 3.42%, due November 2020; unsecured |  |  | 50,000 |  |  | 50,000
﻿Series H notes – 4.03%, due November 2023; unsecured |  |  | 25,000 |  |  | 25,000
﻿Series I notes – 4.18%, due November 2025; unsecured |  |  | 25,000 |  |  | 25,000
﻿Series J notes – Floating rate (LIBOR plus 1.25%), due November 2020; unsecured |  |  | 50,000 |  |  | 50,000
﻿Series K notes – 4.03%, due November 2023; unsecured |  |  | 50,000 |  |  | 50,000
﻿Series L notes – 4.18%, due November 2025; unsecured |  |  | 50,000 |  |  | 50,000
﻿Series M notes – 1.12% due September 2026; unsecured |  |  | 42,076 |  |  | 44,886
﻿Series N notes – 1.31% due September 2028; unsecured |  |  | 80,995 |  |  | 86,406
﻿Series O notes – 1.57% due September 2031; unsecured |  |  | 45,231 |  |  | 48,252
﻿Total debt |  |  | 721,852 |  |  | 729,244
﻿Less: Current portion of long-term debt |  |  | (150,000) |  |  | (150,000)
﻿ Unamortized debt issuance costs |  |  | (1,974) |  |  | (2,091)
﻿Long-term debt, less current portion |  | $ | 569,878 |  | $ | 577,153
﻿

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644 + Details
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