CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands		Dec. 31, 2025	Dec. 31, 2024
Trade accounts receivable-billed, allowance		$ 3,277	$ 3,041
Property and equipment, accumulated depreciation		122,947	133,514
Customer contract costs, accumulated amortization		50,245	44,587
Long-term debt, unamortized discounts		$ 10,548	$ 12,128
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		4,009,000	5,513,000
Common stock, shares outstanding		28,370,000	28,854,000
Common Stock Shares Issued Not Disclosed		true	true
Treasury stock, shares		42,371,000	41,583,000
Software
Intangibles, accumulated amortization		$ 154,240	$ 154,648
Acquired customer contracts
Intangibles, accumulated amortization	[1]	$ 148,567	$ 133,279

[1] Acquired customer contracts represent assets acquired in our business acquisitions. 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.