CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents		$ 186,264	$ 150,365
Short-term investments		0	71
Total cash, cash equivalents and short-term investments		186,264	150,436
Settlement and merchant reserve assets		274,699	238,653
Trade accounts receivable:
Billed, net of allowance of $5,432 and $5,528		267,680	274,189
Unbilled		82,163	52,830
Income taxes receivable		1,345	1,270
Other current assets		50,075	48,577
Total current assets		862,226	765,955
Non-current assets:
Property and equipment, net of depreciation of $121,816 and $105,466		65,545	71,787
Operating lease right-of-use assets		34,283	49,687
Goodwill		308,596	304,036
Customer contract costs, net of amortization of $42,094 and $30,601		54,421	54,735
Deferred income taxes		57,855	26,206
Other assets		10,017	7,956
Total non-current assets		580,820	582,598
Total assets		1,443,046	1,348,553
Current liabilities:
Current portion of long-term debt		7,500	37,500
Operating lease liabilities		15,946	21,012
Customer deposits		41,035	40,472
Trade accounts payable		46,406	47,720
Accrued employee compensation		84,380	68,321
Settlement and merchant reserve liabilities		273,817	237,810
Deferred revenue		54,199	46,033
Income taxes payable		4,104	5,455
Other current liabilities		33,449	22,886
Total current liabilities		560,836	527,209
Non-current liabilities:
Long-term debt, net of unamortized discounts of $15,628 and $2,656		534,997	375,469
Operating lease liabilities		34,360	53,207
Deferred revenue		23,447	21,991
Income taxes payable		3,041	3,410
Deferred income taxes		123	117
Other non-current liabilities		12,916	11,901
Total non-current liabilities		608,884	466,095
Total liabilities		1,169,720	993,304
Stockholders' equity:
Preferred stock, par value $.01 per share; 10,000 shares authorized; zero shares issued and outstanding		0	0
Common stock, par value $.01 per share; 100,000 shares authorized; 6,781 and 5,091 shares reserved for employee stock purchase plan and stock incentive plans; 29,541 and 31,269 shares outstanding		713	708
Additional paid-in capital		490,947	495,189
Treasury stock, at cost; 40,398 and 38,210 shares		(1,136,055)	(1,018,034)
Accumulated other comprehensive income (loss):
Unrealized gain on short-term investments, net of tax		1	1
Cumulative foreign currency translation adjustments		(50,414)	(58,830)
Accumulated earnings		968,134	936,215
Total stockholders' equity		273,326	355,249
Total liabilities and stockholders' equity		1,443,046	1,348,553
Software
Non-current assets:
Intangible assets		14,224	22,774
Acquired customer contracts
Non-current assets:
Intangible assets	[1]	$ 35,879	$ 45,417

[1] Acquired customer contracts represent assets acquired in our prior business acquisitions. Acquired customer contracts are amortized over their estimated useful lives ranging from three 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.