CONDENSED CONSOLIDATED BALANCE SHEETS - UNAUDITED - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 146,212	$ 150,365
Short-term investments	0	71
Total cash, cash equivalents and short-term investments	146,212	150,436
Settlement and merchant reserve assets	176,397	238,653
Trade accounts receivable:
Billed, net of allowance of $4,618 and $5,528	256,310	274,189
Unbilled	78,510	52,830
Income taxes receivable	3,770	1,270
Other current assets	64,216	48,577
Total current assets	725,415	765,955
Non-current assets:
Property and equipment, net of depreciation of $113,196 and $105,466	70,457	71,787
Operating lease right-of-use assets	38,810	49,687
Intangible assets	59,376	68,191
Goodwill	306,641	304,036
Customer contract costs, net of amortization of $34,594 and $30,601	54,114	54,735
Deferred income taxes	30,698	26,206
Other assets	7,558	7,956
Total non-current assets	567,654	582,598
Total assets	1,293,069	1,348,553
Current liabilities:
Current portion of long-term debt	22,500	37,500
Operating lease liabilities	16,624	21,012
Customer deposits	32,713	40,472
Trade accounts payable	37,961	47,720
Accrued employee compensation	62,789	68,321
Settlement and merchant reserve liabilities	174,777	237,810
Deferred revenue	56,468	46,033
Income taxes payable	500	5,455
Other current liabilities	26,770	22,886
Total current liabilities	431,102	527,209
Non-current liabilities:
Long-term debt, net of unamortized discounts of $2,283 and $2,656	402,092	375,469
Operating lease liabilities	38,560	53,207
Deferred revenue	20,792	21,991
Income taxes payable	3,605	3,410
Deferred income taxes	131	117
Other non-current liabilities	13,476	11,901
Total non-current liabilities	478,656	466,095
Total liabilities	909,758	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; 31,751 and 31,269 shares outstanding	713	708
Additional paid-in capital	501,486	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	(54,278)	(58,830)
Accumulated earnings	953,423	936,215
Total stockholders' equity	383,311	355,249
Total liabilities and stockholders' equity	1,293,069	1,348,553
Software
Non-current assets:
Intangible assets	18,890	22,774
Acquired customer contracts
Non-current assets:
Intangible assets	$ 40,486	$ 45,417