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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Statement of Financial Position [Abstract]    
Accumulated depreciation on operating properties $ 1,850,379 $ 1,627,251
Common stock, par value (in usd per share) $ 1 $ 1
Common stock, shares authorized (in shares) 300,000,000 300,000,000
Common stock, shares issued (in shares) 167,965,499 167,660,480
Common stock, shares outstanding (in shares) 167,965,499 167,660,480