Condensed Consolidated Balance Sheets - Unaudited (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 146,158	$ 136,473
Short-term investments	26,545	32,848
Total cash, cash equivalents and short-term investments	172,703	169,321
Trade accounts receivable:
Billed, net of allowance of $3,618 and $3,147	179,093	191,943
Unbilled and other	34,766	33,859
Deferred income taxes	15,828	22,244
Income taxes receivable	16,779	6,469
Other current assets	17,855	17,099
Total current assets	437,024	440,935
Non-current assets:
Property and equipment, net of depreciation of $125,277 and $120,643	37,211	39,429
Software, net of amortization of $71,334 and $68,513	36,969	36,729
Goodwill	226,309	233,365
Client contracts, net of amortization of $82,743 and $184,763	68,750	76,388
Deferred income taxes	2,586	2,596
Income taxes receivable	409	1,292
Other assets	15,751	16,207
Total non-current assets	387,985	406,006
Total assets	825,009	846,941
Current liabilities:
Current maturities of long-term debt	15,000	15,000
Client deposits	32,827	33,807
Trade accounts payable	32,764	30,473
Accrued employee compensation	35,093	61,083
Deferred revenue	58,520	47,691
Income taxes payable	2,436	2,116
Other current liabilities	17,204	21,562
Total current liabilities	193,844	211,732
Non-current liabilities:
Long-term debt, net of unamortized original issue discount of $24,003 and $25,302	257,247	259,698
Deferred revenue	8,276	6,504
Income taxes payable	1,168	1,168
Deferred income taxes	21,172	21,674
Other non-current liabilities	16,645	19,526
Total non-current liabilities	304,508	308,570
Total liabilities	498,352	520,302
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; 33,960 and 33,734 shares outstanding	658	653
Additional paid-in capital	461,400	461,497
Treasury stock, at cost, 31,858 and 31,530 shares	(734,754)	(728,243)
Accumulated other comprehensive income (loss):
Unrealized gain on short-term investments, net of tax	2	3
Unrecognized pension plan losses and prior service costs, net of tax	(1,355)	(1,761)
Unrecognized loss on change in fair value of interest rate swaps, net of tax	(552)	(658)
Cumulative foreign currency translation adjustments	(6,514)	2,274
Accumulated earnings	607,772	592,874
Total stockholders’ equity	326,657	326,639
Total liabilities and stockholders’ equity	$ 825,009	$ 846,941