CONDENSED CONSOLIDATED BALANCE SHEETS - UNAUDITED (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 75,573	$ 82,686
Short-term investments	107,886	128,151
Total cash, cash equivalents and short-term investments	183,459	210,837
Trade accounts receivable:
Billed, net of allowance of $2,736 and $2,359	191,024	178,511
Unbilled	39,513	38,365
Deferred income taxes	8,691	15,085
Income taxes receivable	6,633	3,815
Other current assets	30,514	28,762
Total current assets	459,834	475,375
Non-current assets:
Property and equipment, net of depreciation of $135,483 and $129,522	36,762	35,061
Software, net of amortization of $85,209 and $77,504	44,861	43,565
Goodwill	230,798	233,599
Client contracts, net of amortization of $85,451 and $75,382	45,699	55,191
Deferred income taxes	9,654	7,447
Income taxes receivable	2,170	1,930
Other assets	17,606	16,812
Total non-current assets	387,550	393,605
Total assets	847,384	868,980
Current liabilities:
Current maturities of long-term debt	20,625	15,000
Client deposits	32,952	30,431
Trade accounts payable	31,082	33,376
Accrued employee compensation	40,163	58,434
Deferred revenue	46,899	47,131
Income taxes payable	2,258	2,814
Other current liabilities	21,764	19,620
Total current liabilities	195,743	206,806
Non-current liabilities:
Long-term debt, net of unamortized original issue discount of $15,656 and $19,950	237,469	250,050
Deferred revenue	9,270	9,221
Income taxes payable	1,613	1,909
Deferred income taxes	15,116	20,274
Other non-current liabilities	14,921	14,616
Total non-current liabilities	278,389	296,070
Total liabilities	474,132	502,876
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; 34,527 and 33,745 shares outstanding	667	658
Additional paid-in capital	483,193	473,190
Treasury stock, at cost, 32,222 and 32,030 shares	(743,608)	(738,372)
Accumulated other comprehensive income (loss):
Unrealized gain on short-term investments, net of tax	34	41
Unrecognized loss on change in fair value of interest rate swap contracts, net of tax		(98)
Cumulative foreign currency translation adjustments	(4,511)	1,674
Accumulated earnings	637,477	629,011
Total stockholders' equity	373,252	366,104
Total liabilities and stockholders' equity	$ 847,384	$ 868,980