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CONSOLIDATED BALANCE SHEETS (Unaudited) (Parentheticals) - USD ($)
shares in Thousands, $ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Statement of Financial Position [Abstract]    
Funds held for customers, securities carried at fair value $ 13,027 $ 13,307
Accumulated depreciation 341,046 338,617
Accumulated amortization $ 718,169 $ 698,764
Common stock, par value (per share) $ 1 $ 1
Common stock, shares authorized 500,000 500,000
Common stock, shares outstanding 42,923 42,679