CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents		$ 150,365	$ 205,635
Short-term investments		71	28,037
Total cash, cash equivalents and short-term investments		150,436	233,672
Settlement and merchant reserve assets		238,653	186,267
Trade accounts receivable:
Billed, net of allowance of $5,528 and $4,250		274,189	244,317
Unbilled		52,830	35,802
Income taxes receivable		1,270	6,414
Other current assets		48,577	41,727
Total current assets		765,955	748,199
Non-current assets:
Property and equipment, net of depreciation of $105,466 and $111,244		71,787	73,580
Operating lease right-of-use assets		49,687	86,034
Goodwill		304,036	321,330
Customer contract costs, net of amortization of $30,601 and $32,410		54,735	46,618
Deferred income taxes		26,206	8,584
Other assets		7,956	15,840
Total non-current assets		582,598	638,950
Total assets		1,348,553	1,387,149
Current liabilities:
Current portion of long-term debt		37,500	237,500
Operating lease liabilities		21,012	23,270
Customer deposits		40,472	43,546
Trade accounts payable		47,720	35,397
Accrued employee compensation		68,321	91,115
Settlement and merchant reserve liabilities		237,810	185,276
Deferred revenue		46,033	53,748
Income taxes payable		5,455	398
Other current liabilities		22,886	24,852
Total current liabilities		527,209	695,102
Non-current liabilities:
Long-term debt, net of unamortized discounts of $2,656 and $3,406		375,469	137,219
Operating lease liabilities		53,207	70,068
Deferred revenue		21,991	19,599
Income taxes payable		3,410	4,058
Deferred income taxes		117	7,752
Other non-current liabilities		11,901	13,107
Total non-current liabilities		466,095	251,803
Total liabilities		993,304	946,905
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; 5,091 and 4,704 shares reserved for employee stock purchase plan and stock incentive plans; 31,269 and 32,495 shares outstanding		708	705
Additional paid-in capital		495,189	488,303
Treasury stock, at cost; 38,210 and 36,713 shares		(1,018,034)	(930,106)
Accumulated other comprehensive income (loss):
Unrealized gain (loss) on short-term investments, net of tax		1	(6)
Cumulative foreign currency translation adjustments		(58,830)	(38,347)
Accumulated earnings		936,215	916,060
Total CSG stockholders' equity		355,249	436,609
Noncontrolling interest			3,635
Total stockholders' equity		355,249	440,244
Total liabilities and stockholders' equity		1,348,553	1,387,149
Software
Non-current assets:
Intangible assets		22,774	29,757
Acquired customer contracts
Non-current assets:
Intangible assets	[1]	$ 45,417	$ 57,207

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