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Detail of Certain Balance Sheet Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018
Detail of Certain Balance Sheet Accounts [Abstract] |  |
Assets, Fair Value Disclosure | $ 763 | $ 747
Investments | 408 | 558
Other Assets, Miscellaneous, Noncurrent | 3,767 | 4,760
Other non-current assets | 4,938 | 6,065
Accounts Payable, Trade, Current | 85,276 | 75,293
Accounts Receivable, Allowance for Credit Loss | 868 | 650
Accounts Receivable, Allowance for Credit Loss, Writeoff | 552 | 515
Accounts Receivable, Allowance for Credit Loss | 1,184 | 868
Accrued Salaries | 42,828 | 34,058
Accrued Insurance | 6,683 | 6,202
Other Accrued Liabilities, Current | 18,122 | 15,038
Accounts payable and accrued expenses | 152,909 | 130,591
Accounts Receivable, Allowance for Credit Loss, Writeoff | $ (236) | $ (297)

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- Definition Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=118951113&loc=d3e6935-107765 + Details
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