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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Statement of Financial Position [Abstract] |  |
Accumulated depreciation | $ 1,342,564 | $ 1,273,637
Preferred stock, par value (in dollars per share) | $ 0 | $ 0
Preferred stock, shares authorized (in shares) | 3,800,917 | 3,800,917
Preferred stock, shares outstanding (in shares) | 0 | 0
Common stock, par value (in dollars per share) | $ 0.50 | $ 0.50
Common stock, shares authorized (in shares) | 400,000,000 | 400,000,000
Common stock, shares outstanding (in shares) | 50,251,092 | 53,789,036

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