CONDENSED CONSOLIDATED BALANCE SHEETS - UNAUDITED - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 146,730	$ 150,365
Short-term investments	0	71
Total cash, cash equivalents and short-term investments	146,730	150,436
Settlement and merchant reserve assets	193,371	238,653
Trade accounts receivable:
Billed, net of allowance of $4,731 and $5,528	275,161	274,189
Unbilled	83,612	52,830
Income taxes receivable	2,492	1,270
Other current assets	58,701	48,577
Total current assets	760,067	765,955
Non-current assets:
Property and equipment, net of depreciation of $118,424 and $105,466	68,029	71,787
Operating lease right-of-use assets	37,196	49,687
Intangible assets	54,673	68,191
Goodwill	302,996	304,036
Customer contract costs, net of amortization of $38,174 and $30,601	53,336	54,735
Deferred income taxes	46,271	26,206
Other assets	7,034	7,956
Total non-current assets	569,535	582,598
Total assets	1,329,602	1,348,553
Current liabilities:
Current portion of long-term debt	22,500	37,500
Operating lease liabilities	16,915	21,012
Customer deposits	33,084	40,472
Trade accounts payable	42,623	47,720
Accrued employee compensation	64,313	68,321
Settlement and merchant reserve liabilities	191,637	237,810
Deferred revenue	61,419	46,033
Income taxes payable	2,211	5,455
Other current liabilities	26,831	22,886
Total current liabilities	461,533	527,209
Non-current liabilities:
Long-term debt, net of unamortized discounts of $16,502 and $2,656	535,998	375,469
Operating lease liabilities	37,574	53,207
Deferred revenue	20,828	21,991
Income taxes payable	3,243	3,410
Deferred income taxes	128	117
Other non-current liabilities	9,807	11,901
Total non-current liabilities	607,578	466,095
Total liabilities	1,069,111	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; 29,726 and 31,269 shares outstanding	713	708
Additional paid-in capital	483,063	495,189
Treasury stock, at cost; 40,202 and 38,210 shares	(1,125,897)	(1,018,034)
Accumulated other comprehensive income (loss):
Unrealized gain on short-term investments, net of tax	1	1
Cumulative foreign currency translation adjustments	(60,773)	(58,830)
Accumulated earnings	963,384	936,215
Total stockholders' equity	260,491	355,249
Total liabilities and stockholders' equity	1,329,602	1,348,553
Software
Non-current assets:
Intangible assets	16,741	22,774
Acquired customer contracts
Non-current assets:
Intangible assets	$ 37,932	$ 45,417