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FAIR VALUE OF FINANCIAL INSTRUMENTS - Recurring Fair Value Measurements (Detail) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Assets: |  |
Restricted investment securities - landfill closure | $ 1,871 | $ 1,848
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets: |  |
Interest rate swaps | 0 |
Total assets | 1,871 |
Liabilities: |  |
Interest rate swaps | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Landfill |  |
Assets: |  |
Restricted investment securities - landfill closure | 1,871 | 1,848
Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Interest rate swaps | 614 |
Total assets | 614 |
Liabilities: |  |
Interest rate swaps | 8,868 | 13,237
Recurring | Significant Other Observable Inputs (Level 2) | Landfill |  |
Assets: |  |
Restricted investment securities - landfill closure | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Interest rate swaps | 0 |
Total assets | 0 |
Liabilities: |  |
Interest rate swaps | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Landfill |  |
Assets: |  |
Restricted investment securities - landfill closure | $ 0 | $ 0

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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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