CONDENSED CONSOLIDATED BALANCE SHEETS - UNAUDITED (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Trade accounts receivable-billed, allowance	$ 4,731	$ 5,528
Property and equipment, accumulated depreciation	118,424	105,466
Intangibles, accumulated amortization	286,941	270,417
Customer contract costs, accumulated amortization	38,174	30,601
Long-term debt, unamortized discounts	$ 16,502	$ 2,656
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	29,726,000	31,269,000
Treasury stock, shares	40,202,000	38,210,000
Software
Intangibles, accumulated amortization	$ 159,451	$ 150,337
Acquired customer contracts
Intangibles, accumulated amortization	$ 127,490	$ 120,080