CONDENSED CONSOLIDATED BALANCE SHEETS - UNAUDITED - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 133,770	$ 205,635
Short-term investments	1,265	28,037
Total cash, cash equivalents and short-term investments	135,035	233,672
Settlement and merchant reserve assets	213,460	186,267
Trade accounts receivable:
Billed, net of allowance of $5,105 and $4,250	236,577	244,317
Unbilled	46,433	35,802
Income taxes receivable	19,563	6,414
Other current assets	57,187	41,727
Total current assets	708,255	748,199
Non-current assets:
Property and equipment, net of depreciation of $116,948 and $111,244	75,676	73,580
Operating lease right-of-use assets	58,629	86,034
Intangible assets	76,823	86,964
Goodwill	301,222	321,330
Customer contract costs, net of amortization of $30,578 and $32,410	48,530	46,618
Deferred income taxes	8,251	8,584
Other assets	13,293	15,840
Total non-current assets	582,424	638,950
Total assets	1,290,679	1,387,149
Current liabilities:
Current portion of long-term debt	252,500	237,500
Operating lease liabilities	21,387	23,270
Customer deposits	32,921	43,546
Trade accounts payable	34,182	35,397
Accrued employee compensation	52,464	91,115
Settlement and merchant reserve liabilities	212,036	185,276
Deferred revenue	52,514	53,748
Income taxes payable	653	398
Other current liabilities	24,780	24,852
Total current liabilities	683,437	695,102
Non-current liabilities:
Long-term debt, net of unamortized discounts of $3,030 and $3,406	133,845	137,219
Operating lease liabilities	59,169	70,068
Deferred revenue	19,382	19,599
Income taxes payable	4,014	4,058
Deferred income taxes	196	7,752
Other non-current liabilities	13,614	13,107
Total non-current liabilities	230,220	251,803
Total liabilities	913,657	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; 32,195 and 32,495 shares outstanding	709	705
Additional paid-in capital	479,271	488,303
Treasury stock, at cost; 37,339 and 36,713 shares	(967,659)	(930,106)
Accumulated other comprehensive income (loss):
Unrealized loss on short-term investments, net of tax	(3)	(6)
Cumulative foreign currency translation adjustments	(55,529)	(38,347)
Accumulated earnings	920,233	916,060
Total CSG stockholders' equity	377,022	436,609
Noncontrolling interest	0	3,635
Total stockholders' equity	377,022	440,244
Total liabilities and stockholders' equity	1,290,679	1,387,149
Software
Non-current assets:
Intangible assets	25,855	29,757
Acquired customer contracts
Non-current assets:
Intangible assets	$ 50,968	$ 57,207