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ACCRUED EXPENSES | 12 Months Ended
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Dec. 31, 2021
Payables and Accruals [Abstract] |
ACCRUED EXPENSES | ACCRUED EXPENSES Accrued expenses consisted of the following (in thousands):
| December 31, 2021 |  | December 31, 2020
Accrued insurance | $ | 102,853 |  |  | $ | 77,514 |
Accrued interest | 19,785 |  |  | 19,697 |
Accrued compensation and benefits | 133,604 |  |  | 81,437 |
Accrued income, real estate, sales and other taxes | 29,954 |  |  | 25,843 |
Interest rate swap liability | 17,383 |  |  | 33,630 |
Accrued other | 87,835 |  |  | 57,702 |
| $ | 391,414 |  |  | $ | 295,823 |
As of December 31, 2021 and 2020, accrued insurance included employee medical insurance costs of $18.6 million and $9.4 million, respectively, and accruals for losses under our workers' compensation, comprehensive general liability and vehicle liability self-insurance programs of $82.8 million and $65.6 million, respectively. The increase in accrued insurance was predominately due to incremental balances from the acquisition of HydroChemPSC. Accrued compensation and benefits increased from the comparable period in 2020 primarily due to an increase in accrued bonus and incremental balances from the acquisition of HydroChemPSC. The majority of the increase in Accrued other is also due to the incremental balances from the acquisition of HydroChemPSC. The decrease in the fair value of the interest rate swap liability from December 31, 2020 is mainly due to the passage of time and changes in future interest rate expectation. For additional information relating to the derivative liability, see Note 11, "Financing Arrangements."

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