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Participation and Contributions to Multi Employer Pension Plans (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018
Multiemployer Plans [Line Items] |  |  |
Company Contributions | $ 9,657 | $ 9,598 | $ 9,141
New England Teamsters & Trucking Industry Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
EIN | 046372430 |  |
Pension Plan Number | 001 |  |
Pension Protection Act Zone Status | Red | Red |
FIP / RP Status Pending / Implemented | Implemented |  |
Company Contributions | $ 2,659 | $ 2,468 | 2,455
Surcharge Imposed | No |  |
New England Teamsters & Trucking Industry Pension Fund | Minimum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Date of Collective-Bargaining Agreements, Date | Apr. 30, 2021 |  |
New England Teamsters & Trucking Industry Pension Fund | Maximum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Date of Collective-Bargaining Agreements, Date | Apr. 30, 2023 |  |
Westchester Teamsters Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
EIN | 136123973 |  |
Pension Plan Number | 001 |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
Company Contributions | $ 887 | $ 1,039 | 846
Surcharge Imposed | No |  |
Westchester Teamsters Pension Fund | Minimum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Date of Collective-Bargaining Agreements, Date | Jan. 31, 2024 |  |
Westchester Teamsters Pension Fund | Maximum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Date of Collective-Bargaining Agreements, Date | Dec. 31, 2024 |  |
Local 553 Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
EIN | 136637826 |  |
Pension Plan Number | 001 |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
Company Contributions | $ 2,678 | $ 3,114 | 2,888
Surcharge Imposed | No |  |
Local 553 Pension Fund | Minimum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Date of Collective-Bargaining Agreements, Date | Dec. 15, 2022 |  |
Local 553 Pension Fund | Maximum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Date of Collective-Bargaining Agreements, Date | Jan. 15, 2023 |  |
Local 463 Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
EIN | 111800729 |  |
Pension Plan Number | 001 |  |
Pension Protection Act Zone Status | Green | Green |
FIP / RP Status Pending / Implemented | NA |  |
Company Contributions | $ 138 | $ 144 | 145
Surcharge Imposed | No |  |
Local 463 Pension Fund | Minimum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Date of Collective-Bargaining Agreements, Date | Jun. 30, 2022 |  |
Local 463 Pension Fund | Maximum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Date of Collective-Bargaining Agreements, Date | Feb. 28, 2023 |  |
IAM National Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
EIN | 516031295 |  |
Pension Protection Act Zone Status | Red | Red |
FIP / RP Status Pending / Implemented | Implemented |  |
Company Contributions | $ 2,822 | $ 2,296 | 2,320
Surcharge Imposed | Yes |  |
IAM National Pension Fund | Minimum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Date of Collective-Bargaining Agreements, Date | Dec. 31, 2020 |  |
IAM National Pension Fund | Maximum |  |  |
Multiemployer Plans [Line Items] |  |  |
Expiration Date of Collective-Bargaining Agreements, Date | Jul. 01, 2023 |  |
All Other Multiemployer Pension Plans |  |  |
Multiemployer Plans [Line Items] |  |  |
Company Contributions | $ 448 | $ 507 | 437
Teamsters Local 469 Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
EIN | 226172237 |  |
Pension Protection Act Zone Status | Red | Red |
FIP / RP Status Pending / Implemented | Implemented |  |
Company Contributions | $ 20 | $ 26 | 46
Surcharge Imposed | Yes |  |
Expiration Date of Collective-Bargaining Agreements, Date | Aug. 31, 2021 |  |
Local 445 Pension Fund |  |  |
Multiemployer Plans [Line Items] |  |  |
EIN | 131864489 |  |
Pension Protection Act Zone Status | Red | Red |
FIP / RP Status Pending / Implemented | Implemented |  |
Company Contributions | $ 5 | $ 4 | $ 4
Surcharge Imposed | Yes |  |
Expiration Date of Collective-Bargaining Agreements, Date | Oct. 31, 2021 |  |

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