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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Sep. 30, 2017
Accounting Policies [Abstract] |
Estimated useful life of property, plant and equipment by category | Depreciation is determined under the straight‑line method based upon the estimated useful life of the asset as follows:
Buildings |  | 40 Years
Building and land improvements |  | 20 Years
Transportation equipment |  | 3-10 Years
Storage facilities |  | 7-30 Years
Office equipment |  | 5-10 Years
Tanks and cylinders |  | 10-40 Years
Computer software |  | 3-7 Years
The weighted average estimated useful life of the Partnership’s storage facilities and tanks and cylinders is approximately 22 years and 28 years, respectively.

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- Definition Tabular disclosure of the useful life of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
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- References No definition available. + Details
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