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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
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Statement of Financial Position [Abstract] |  |
Account receivable, allowances aggregating | $ 43,393 | $ 45,253
Closure and post-closure liabilities, current portion | 12,186 | 13,205
Remedial liabilities, current portion | $ 9,616 | $ 9,918
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common stock, authorized shares (in shares) | 80,000,000 | 80,000,000
Common stock, issued shares (in shares) | 54,090,202 | 54,064,797
Common stock, outstanding shares (in shares) | 54,090,202 | 54,064,797

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