CONDENSED CONSOLIDATED BALANCE SHEETS - UNAUDITED - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 167,681	$ 150,365
Short-term investments	0	71
Total cash, cash equivalents and short-term investments	167,681	150,436
Settlement and merchant reserve assets	177,300	238,653
Trade accounts receivable:
Billed, net of allowance of $5,254 and $5,528	255,774	274,189
Unbilled	73,262	52,830
Income taxes receivable	2,236	1,270
Other current assets	55,285	48,577
Total current assets	731,538	765,955
Non-current assets:
Property and equipment, net of depreciation of $107,836 and $105,466	68,648	71,787
Operating lease right-of-use assets	42,470	49,687
Intangible assets	63,826	68,191
Goodwill	305,104	304,036
Customer contract costs, net of amortization of $33,191 and $30,601	54,437	54,735
Deferred income taxes	22,177	26,206
Other assets	7,808	7,956
Total non-current assets	564,470	582,598
Total assets	1,296,008	1,348,553
Current liabilities:
Current portion of long-term debt, net of unamortized discounts	37,500	37,500
Operating lease liabilities	19,220	21,012
Customer deposits	34,429	40,472
Trade accounts payable	36,121	47,720
Accrued employee compensation	49,836	68,321
Settlement and merchant reserve liabilities	176,329	237,810
Deferred revenue	54,794	46,033
Income taxes payable	7,956	5,455
Other current liabilities	25,550	22,886
Total current liabilities	441,735	527,209
Non-current liabilities:
Long-term debt, net of unamortized discounts of $2,469 and $2,656	403,781	375,469
Operating lease liabilities	45,097	53,207
Deferred revenue	21,756	21,991
Income taxes payable	3,510	3,410
Deferred income taxes	120	117
Other non-current liabilities	11,786	11,901
Total non-current liabilities	486,050	466,095
Total liabilities	927,785	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; 31,678 and 31,269 shares outstanding	712	708
Additional paid-in capital	493,184	495,189
Treasury stock, at cost; 38,210 shares	(1,018,034)	(1,018,034)
Accumulated other comprehensive income (loss):
Unrealized gain on short-term investments, net of tax	1	1
Cumulative foreign currency translation adjustments	(55,987)	(58,830)
Accumulated earnings	948,347	936,215
Total stockholders' equity	368,223	355,249
Total liabilities and stockholders' equity	1,296,008	1,348,553
Software
Non-current assets:
Intangible assets	20,935	22,774
Acquired customer contracts
Non-current assets:
Intangible assets	$ 42,891	$ 45,417