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Supplementary Balance Sheet Information (Tables) | 12 Months Ended
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Sep. 30, 2017
Supplementary Balance Sheet Information [Abstract] |
Accrued Expenses and Current Portion of Other Long-Term Liabilities |
﻿ |  |  |  |  |  |
﻿ |  |  |  |  |  |
﻿ |  | 2017 |  | 2016
﻿Property, payroll, and other taxes payable |  | $ | 21,261,924 |  | $ | 18,883,819
﻿Salaries, wages, and bonuses payable |  |  | 28,369,250 |  |  | 28,159,164
﻿Self-insurance liabilities: |  |  |  |  |  |
﻿ Employee group insurance |  |  | 4,893,855 |  |  | 5,807,558
﻿ Workers’ compensation insurance |  |  | 5,387,235 |  |  | 5,929,533
﻿ General liability insurance |  |  | 3,045,020 |  |  | 2,345,956
﻿Interest |  |  | 13,175,382 |  |  | 12,406,614
﻿Other |  |  | 6,319,191 |  |  | 2,782,962
﻿Total accrued expenses and current portion of other long-term liabilities |  | $ | 82,451,857 |  | $ | 76,315,606
﻿
Schedule of Other Long-Term Liabilities |
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﻿ |  | 2017 |  | 2016
﻿Advance payments on purchases contracts |  | $ | 3,185,034 |  | $ | 1,624,792
﻿Deferred lease expense |  |  | 1,913,811 |  |  | 1,884,501
﻿Nonqualified investment plan liability |  |  | 13,303,318 |  |  | 10,692,707
﻿Self-insurance liabilities: |  |  |  |  |  |
﻿ Workers’ compensation insurance |  |  | 17,147,541 |  |  | 18,101,931
﻿ General liability insurance |  |  | 4,663,347 |  |  | 3,700,263
﻿Other |  |  | 1,867,015 |  |  | 1,655,285
﻿Other long-term liabilities |  |  | 42,080,066 |  |  | 37,659,479
﻿Less current portion |  |  | 967,518 |  |  | 883,892
﻿Total other long-term liabilities |  | $ | 41,112,548 |  | $ | 36,775,587
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