CONDENSED CONSOLIDATED BALANCE SHEETS - UNAUDITED (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Trade accounts receivable-billed, allowance	$ 4,720	$ 5,432
Property and equipment, accumulated depreciation	131,573	121,816
Intangibles, accumulated amortization	293,236	284,070
Customer contract costs, accumulated amortization	44,140	42,094
Long-term debt, unamortized discounts	$ 13,893	$ 15,628
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares outstanding	29,591,000	29,541,000
Treasury stock, shares	40,802,000	40,398,000
Software
Intangibles, accumulated amortization	$ 164,369	$ 157,601
Acquired customer contracts
Intangibles, accumulated amortization	$ 128,867	$ 126,469