CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands		Dec. 31, 2024	Dec. 31, 2023
Trade accounts receivable-billed, allowance		$ 3,041	$ 5,432
Property and equipment, accumulated depreciation		133,514	121,816
Customer contract costs, accumulated amortization		44,587	42,094
Long-term debt, unamortized discounts		$ 12,128	$ 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 reserved for employee stock purchase plan and stock incentive plans		5,513,000	6,781,000
Common stock, shares outstanding		28,854,000	29,541,000
Treasury stock, shares		41,583	40,398
Software
Intangibles, accumulated amortization		$ 154,648	$ 157,601
Acquired customer contracts
Intangibles, accumulated amortization	[1]	$ 133,279	$ 126,469

[1] Acquired customer contracts represent assets acquired in our business acquisitions, to include the 2024 acquisitions discussed in Note 7. Acquired customer contracts are amortized over their estimated useful lives ranging from five to twenty years based on the approximate pattern in which the economic benefits of the intangible assets are expected to be realized, with the amortization expense included as cost of revenue in our Income Statements.