CONDENSED CONSOLIDATED BALANCE SHEETS - UNAUDITED - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 140,221	$ 132,631
Short-term investments	125,917	108,305
Total cash, cash equivalents and short-term investments	266,138	240,936
Trade accounts receivable:
Billed, net of allowance of $2,906 and $3,600	201,610	178,854
Unbilled	33,934	41,110
Income taxes receivable	4,012	4,038
Other current assets	33,320	35,153
Total current assets	539,014	500,091
Non-current assets:
Property and equipment, net of depreciation of $120,813 and $112,282	30,618	35,992
Intangible assets	66,060	74,833
Goodwill	206,887	219,724
Deferred income taxes	14,239	17,462
Other assets	11,300	14,629
Total non-current assets	329,104	362,640
Total assets	868,118	862,731
Current liabilities:
Current portion of long-term debt, net of unamortized discounts of $734 and $8,632	47,123	148,868
Client deposits	32,746	33,694
Trade accounts payable	25,348	43,392
Accrued employee compensation	58,941	59,607
Deferred revenue	48,959	41,907
Income taxes payable	2,234	8,962
Other current liabilities	17,260	22,980
Total current liabilities	232,611	359,410
Non-current liabilities:
Long-term debt, net of unamortized discounts of $24,169 and $4,738	329,581	130,262
Deferred revenue	7,726	9,828
Income taxes payable	4,392	4,413
Deferred income taxes	19	182
Other non-current liabilities	12,828	12,791
Total non-current liabilities	354,546	157,476
Total liabilities	587,157	516,886
Current portion of long-term debt conversion obligation	28,690
Stockholders' equity:
Preferred stock, par value $.01 per share; 10,000 shares authorized; zero shares issued and outstanding
Common stock, par value $.01 per share; 100,000 shares authorized; 32,317 and 32,555 shares outstanding	672	672
Common stock warrants; 2,851 and 2,851 warrants issued and outstanding	7,310	7,310
Additional paid-in capital	397,029	503,254
Treasury stock, at cost, 34,865 and 34,601 shares	(823,963)	(814,437)
Accumulated other comprehensive income (loss):
Unrealized loss on short-term investments, net of tax	(6)	(97)
Cumulative foreign currency translation adjustments	(36,721)	(26,288)
Accumulated earnings	707,950	675,431
Total stockholders' equity	252,271	345,845
Total liabilities, current portion of long-term debt conversion obligation and stockholders' equity	868,118	862,731
Software
Non-current assets:
Intangible assets	30,365	35,095
Client contracts
Non-current assets:
Intangible assets	$ 35,695	$ 39,738