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CONSOLIDATED BALANCE SHEETS (Unaudited) (Parentheticals) - USD ($)
shares in Thousands, $ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Statement of Financial Position [Abstract]    
Accumulated depreciation $ 360,458 $ 354,832
Accumulated amortization $ 645,057 $ 616,817
Common stock, par value (per share) $ 1 $ 1
Common stock, shares authorized 500,000 500,000
Common stock, shares outstanding 44,740 44,315