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SUPPLEMENTAL BALANCE SHEET INFORMATION - Accounts Receivable, Prepaid Expenses and Other Current Assets, Accrued Liabilities and Long-Term Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Oct. 01, 2019 | Sep. 30, 2019
--- | --- | --- | ---
Accounts receivable, net of reserve: |  |  |
Trade receivables | $ 150,249 |  | $ 461,774
Income tax receivable | 42,374 |  | 33,828
Total accounts receivable, net of reserve | 192,623 |  | 495,602
Prepaid expenses and other current assets: |  |  |
Restricted cash | 45,577 |  | 31,291
Deferred mobilization | 4,528 |  | 10,571
Prepaid insurance | 8,655 |  | 5,556
Prepaid value added tax | 7,484 |  | 5,209
Prepaid maintenance and rent | 7,273 |  | 9,113
Accrued demobilization | 2,367 |  | 2,151
Other | 13,421 |  | 5,037
Total prepaid expenses and other current assets | 89,305 |  | 68,928
Accrued liabilities: |  |  |
Accrued operating costs | 10,942 |  | 34,992
Payroll and employee benefits | 27,068 |  | 79,465
Taxes payable, other than income tax | 39,762 |  | 50,566
Self-insurance liabilities | 36,518 |  | 37,117
Deferred income | 9,266 |  | 25,426
Deferred mobilization revenue | 5,705 |  | 14,737
Accrued income taxes | 0 |  | 19,277
Escrow | 138 |  | 1,388
Litigation and claims | 393 |  | 9,990
Contingent earnout liability | 4,926 |  | 5,535
Operating lease liability | 11,364 | $ 16,277 |
Other | 9,360 |  | 8,599
Total accrued liabilities | 155,442 |  | 287,092
Noncurrent liabilities — Other: |  |  |
Pension and other non-qualified retirement plans | 54,043 |  | 51,768
Self-insurance liabilities | 37,369 |  | 37,118
Contingent earnout liability | 4,197 |  | 12,838
Deferred revenue | 2,955 |  | 9,471
Uncertain tax positions including interest and penalties | 2,895 |  | 2,544
Operating lease liability | 33,886 | $ 39,794 |
Payroll tax deferral | 10,205 |  | 0
Other | 1,630 |  | 2,007
Total noncurrent liabilities — other | $ 147,180 |  | $ 115,746

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- Definition The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(5)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: 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(3)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-06(3)) -URI http://asc.fasb.org/extlink&oid=120401414&loc=d3e604059-122996 Reference 4: 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(4)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6676-107765 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3044-108585 Reference 3: 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(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121583591&loc=SL98516268-108586 + Details
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- Definition Carrying amount of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property that are expected to be paid within one year (or the normal operating cycle, if longer). + References No definition available. + Details
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