CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 126,351	$ 132,631
Short-term investments	150,147	108,305
Total cash, cash equivalents and short-term investments	276,498	240,936
Trade accounts receivable:
Billed, net of allowance of $3,080 and $3,600	208,930	178,854
Unbilled	30,828	41,110
Income taxes receivable	11,931	4,038
Other current assets	31,751	35,153
Total current assets	559,938	500,091
Non-current assets:
Property and equipment, net of depreciation of $122,866 and $112,282	33,116	35,992
Goodwill	201,094	219,724
Deferred income taxes	14,218	17,462
Other assets	12,411	14,629
Total non-current assets	331,941	362,640
Total assets	891,879	862,731
Current liabilities:
Current portion of long-term debt, net of unamortized discounts of $296 and $8,632	49,426	148,868
Client deposits	33,916	33,694
Trade accounts payable	35,118	43,392
Accrued employee compensation	65,341	59,607
Deferred revenue	45,064	41,907
Income taxes payable	822	8,962
Other current liabilities	22,342	22,980
Total current liabilities	252,029	359,410
Non-current liabilities:
Long-term debt, net of unamortized discounts of $23,007 and $4,738	326,993	130,262
Deferred revenue	6,694	9,828
Income taxes payable	2,245	4,413
Deferred income taxes	99	182
Other non-current liabilities	12,618	12,791
Total non-current liabilities	348,649	157,476
Total liabilities	600,678	516,886
Current portion of long-term debt conversion obligation	39,841
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; 3,971 and 4,664 shares reserved for employee stock purchase plan and stock incentive plans; 32,261 and 32,555 shares outstanding	672	672
Common stock warrants; 2,851 and 2,851 warrants issued and outstanding	16,007	7,310
Additional paid-in capital	391,209	503,254
Treasury stock, at cost, 34,919 and 34,601 shares	(826,002)	(814,437)
Accumulated other comprehensive income (loss):
Unrealized loss on short-term investments, net of tax	(159)	(97)
Cumulative foreign currency translation adjustments	(45,213)	(26,288)
Accumulated earnings	714,846	675,431
Total stockholders' equity	251,360	345,845
Total liabilities, current portion of long-term debt conversion obligation and stockholders' equity	891,879	862,731
Software
Non-current assets:
Intangible assets	30,427	35,095
Client contracts
Non-current assets:
Intangible assets	$ 40,675	$ 39,738