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Fair Value Measurements (Tables) | 6 Months Ended
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Mar. 31, 2019
Fair Value Disclosures [Abstract] |
Fair Value of Assets and Liabilities Measured on a Recurring Basis | The fair values of the Company's assets and liabilities measured on a recurring basis are categorized as follows:
| March 31, 2019 |  | September 30, 2018
| Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives (1) | $ | — |  |  | $ | 4,791 |  |  | $ | — |  |  | $ | 4,791 |  |  | $ | — |  |  | $ | 11,309 |  |  | $ | — |  |  | $ | 11,309 |
Equity and fixed income mutual funds | — |  |  | 22,512 |  |  | — |  |  | 22,512 |  |  | — |  |  | 22,758 |  |  | — |  |  | 22,758 |
Life insurance policies | — |  |  | 4,045 |  |  | — |  |  | 4,045 |  |  | — |  |  | 5,894 |  |  | — |  |  | 5,894 |
Total assets at fair value | $ | — |  |  | $ | 31,348 |  |  | $ | — |  |  | $ | 31,348 |  |  | $ | — |  |  | $ | 39,961 |  |  | $ | — |  |  | $ | 39,961 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives (1) | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Total liabilities at fair value | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
(1) Interest rate swaps are valued based on observable market swap rates and are classified within Level 2 of the fair value hierarchy.

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 + Details
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