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Debt (Tables) | 6 Months Ended
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Mar. 31, 2016
Debt [Abstract] |
Interest rate swaps | The Company has entered into the following interest rate swaps:
Effective Date |  | Amount |  |  | Fixed Interest Rate |  |  | Interest Rate Spread at March 31, 2016 |  |  | Maturity Date
June 2012 |  | $ | 40,000 |  |  |  | 1.88% |  |  |  | 1.75% |  |  | June 2022
August 2012 |  |  | 35,000 |  |  |  | 1.74% |  |  |  | 1.75% |  |  | June 2022
September 2012 |  |  | 25,000 |  |  |  | 1.24% |  |  |  | 1.75% |  |  | March 2017
May 2014 |  |  | 25,000 |  |  |  | 1.35% |  |  |  | 1.75% |  |  | May 2018
November 2014 |  |  | 25,000 |  |  |  | 1.26% |  |  |  | 1.75% |  |  | June 2018
March 2015 |  |  | 25,000 |  |  |  | 1.49% |  |  |  | 1.75% |  |  | March 2019
September 2015 |  |  | 25,000 |  |  |  | 1.39% |  |  |  | 1.75% |  |  | September 2020
November 2015 |  |  | 25,000 |  |  |  | 1.32% |  |  |  | 1.75% |  |  | November 2020
December 2015 |  |  | 25,000 |  |  |  | 1.59% |  |  |  | 1.75% |  |  | December 2020
February 2016 |  |  | 25,000 |  |  |  | 0.99% |  |  |  | 1.75% |  |  | February 2020
February 2016 |  |  | 25,000 |  |  |  | 1.03% |  |  |  | 1.75% |  |  | February 2022
Derivatives designated as hedging instruments | At March 31, 2016 and September 30, 2015, the interest rate swap contracts were reflected in the consolidated balance sheets as follows:
Derivatives |  | March 31, 2016 |  |  | September 30, 2015 |
Current assets: |  |  |  |  |  |
Other current assets |  | $ | 26 |  |  | $ | - |
Long-term assets: |  |  |  |  |  |  |  |
Other assets |  |  | 126 |  |  |  | - |
Current liabilities: |  |  |  |  |  |  |  |
Other current liabilities |  |  | (1,465 | ) |  |  | (1,165 | )
Long-term liabilities: |  |  |  |  |  |  |  |
Other liabilities |  |  | (4,433 | ) |  |  | (2,521 | )
Total derivatives |  | $ | (5,746 | ) |  | $ | (3,686 | )
Loss recognized on derivatives | The loss recognized on derivatives was as follows:
Derivatives in Cash Flow Hedging Relationships | Location of Loss Recognized in Income on Derivative |  | Amount of |  |  | Amount of |
| Loss Recognized |  |  | Loss Recognized |
| in Income |  |  | in Income |
| on Derivatives |  |  | on Derivatives |
|  |  | Three Months ended March 31, |  |  | Six Months ended March 31, |
|  |  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Interest rate swaps | Interest expense |  | $ | (746 | ) |  | $ | (996 | ) |  | $ | (1,576 | ) |  | $ | (2,073 | )
The Company recognized the following gains or losses in AOCI:
| Amount of Loss |
|  |  |  |  |  | Reclassified from |
|  | Amount of |  |  |  | AOCI into |
|  | Loss Recognized in |  | Location of Gain or (Loss) Reclassified From AOCI into Income (Effective Portion*) |  | Income |
Derivatives in Cash Flow Hedging Relationships |  | AOCI on Derivatives |  |  |  | (Effective Portion*) |
|  | March 31, 2016 |  |  | March 31, 2015 |  |  |  |  | March 31, 2016 |  |  | March 31, 2015 |
Interest rate swaps |  | $ | (2,218 | ) |  | $ | (3,212 | ) | Interest expense |  | $ | (961 | ) |  | $ | (1,265 | )
*There is no ineffective portion or amount excluded from effectiveness testing. |

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified 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 -URI http://asc.fasb.org/extlink&oid=56946850&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 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959 + Details
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- Definition Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41641-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41678-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41638-113959 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5580258-113959 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579245-113959 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579240-113959 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41620-113959 Reference 11: 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.(n)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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