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Supplemental Balance Sheet Information | 12 Months Ended
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Dec. 31, 2022
Balance Sheet Related Disclosures [Abstract] |
Supplemental Balance Sheet Information | SUPPLEMENTAL BALANCE SHEET INFORMATION Components of "Intangibles and other assets, net" at December 31, 2022 and 2021 were as follows:
| 2022 |  | 2021
Catalyst and turnaround costs | $ | 1,108 |  |  | $ | 687 |
Other intangible assets | 154 |  |  | 358 |
Other | 1,152 |  |  | 1,153 |
| $ | 2,414 |  |  | $ | 2,198 |
Other intangible assets consist of technology-based assets. Amortization expense, included in "Depreciation and amortization" on the Partnership's Consolidated Statements of Operations includes amortization of intangible assets, turnaround expenses, and deferred charges. Aggregate amortization expense was $5,713, $4,085, and $5,235, for the years ended December 31, 2022, 2021 and 2020, respectively. Estimated amortization expense for the years subsequent to December 31, 2022 are as follows: 2023 - $4,648; 2024 - $890; 2025 - $309; 2026 - $1; 2027 - $0; subsequent years - $0. Components of "Other accrued liabilities" at December 31, 2022 and 2021 were as follows:
| 2022 |  | 2021
Accrued interest | $ | 15,131 |  |  | $ | 15,135 |
Asset retirement obligations | 298 |  |  | 261 |
Property and other taxes payable | 4,562 |  |  | 4,631 |
Accrued payroll | 3,504 |  |  | 2,973 |
Operating lease liabilities | 9,084 |  |  | 6,600 |
Other | 495 |  |  | 250 |
| $ | 33,074 |  |  | $ | 29,850 |
The schedule below summarizes the changes in our asset retirement obligations:
| Year Ended December 31,
| 2022 |  | 2021
| (In thousands)
Beginning asset retirement obligations | $ | 9,072 |  |  | $ | 8,759 |
Revisions to existing liabilities 1 | — |  |  | — |
Accretion expense | 381 |  |  | 375 |
Liabilities settled | (4,461) |  |  | (62) |
Ending asset retirement obligations | 4,992 |  |  | 9,072 |
Current portion of asset retirement obligations 2 | (298) |  |  | (261) |
Long-term portion of asset retirement obligations 3 | $ | 4,694 |  |  | $ | 8,811 |
1 Several factors are considered in the annual review process, including inflation rates, current estimates for removal cost, discount rates, and the estimated remaining useful life of the assets. 2 The current portion of asset retirement obligations is included in "Other current liabilities" on the Partnership's Consolidated Balance Sheets. 3 The non-current portion of asset retirement obligations is included in "Other long-term obligations" on the Partnership's Consolidated Balance Sheets.

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI https://asc.fasb.org/topic&trid=2122208 + Details
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