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Detail of Certain Balance Sheet Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020
Detail of Certain Balance Sheet Accounts [Abstract] |  |
Accounts Receivable, Allowance for Credit Loss, Beginning | $ 2,613 |
Accounts Receivable, Allowance for Credit Loss, Ending | 2,387 | $ 2,613
Accounts payable, trade | 136,967 | 93,315
Accrued compensation and benefits | 61,109 | 53,933
Accrued insurance liabilities | 5,787 | 6,254
Current operating lease liabilities | 13,973 | 11,056
Other accrued expenses | 31,278 | 22,152
Accounts payable and accrued expenses | 249,114 | 186,710
Executive Savings Plan assets | 937 | 766
Securities and equity investments | 10 | 0
Finance Lease, Right-of-Use Asset, after Accumulated Amortization | 3,927 | 1,600
Other | 2,175 | 3,414
Other non-current assets | $ 7,049 | $ 5,780

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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=120391452&loc=d3e13212-122682 + Details
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