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CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Parenthetical) - USD ($) shares in Thousands, $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
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Statement of Financial Position [Abstract] |  |
Allowance for doubtful accounts | $ 1,003 | $ 1,007
Property, plant and equipment, accumulated depreciation | $ 380,363 | $ 381,584
Capital Stock, par value (in dollars per share) | $ 1 | $ 1
Capital Stock, authorized shares (shares) | 50,000 | 50,000
Capital Stock, shares issued (shares) | 18,616 | 18,574
Capital Stock, shares outstanding (shares) | 18,616 | 18,574

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