Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 82,686	$ 133,747
Short-term investments	128,151	35,574
Total cash, cash equivalents and short-term investments	210,837	169,321
Trade accounts receivable:
Billed, net of allowance of $2,359 and $3,147	178,511	191,943
Unbilled	38,365	28,463
Deferred income taxes	15,085	22,244
Income taxes receivable	3,815	6,469
Other current assets	28,762	21,915
Total current assets	475,375	440,355
Non-current assets:
Property and equipment, net of depreciation of $129,522 and $120,643	35,061	39,429
Software, net of amortization of $77,504 and $68,496	43,565	38,372
Goodwill	233,599	233,365
Client contracts, net of amortization of $75,382 and $182,182	55,191	75,303
Deferred income taxes	7,447	2,596
Income taxes receivable	1,930	1,291
Other assets	16,812	16,230
Total non-current assets	393,605	406,586
Total assets	868,980	846,941
Current liabilities:
Current maturities of long-term debt	15,000	15,000
Client deposits	30,431	33,807
Trade accounts payable	33,376	30,473
Accrued employee compensation	58,434	61,083
Deferred revenue	47,131	47,691
Income taxes payable	2,814	2,116
Other current liabilities	19,620	21,562
Total current liabilities	206,806	211,732
Non-current liabilities:
Long-term debt, net of unamortized original issue discount of $19,950 and $25,302	250,050	259,698
Deferred revenue	9,221	6,504
Income taxes payable	1,909	1,168
Deferred income taxes	20,274	21,674
Other non-current liabilities	14,616	19,526
Total non-current liabilities	296,070	308,570
Total liabilities	502,876	520,302
Stockholders' equity:
Preferred stock, par value $.01 per share; 10,000 shares authorized; zero shares issued and outstanding	0
Common stock, par value $.01 per share; 100,000 shares authorized; 5,441 and 6,904 shares reserved for employee stock purchase plan and stock incentive plans; 33,745 and 33,734 shares outstanding	658	653
Additional paid-in capital	473,190	461,497
Treasury stock, at cost, 32,030 and 31,530 shares	(738,372)	(728,243)
Accumulated other comprehensive income (loss):
Unrealized gain on short-term investments, net of tax	41	3
Unrecognized pension plan losses and prior service costs, net of tax	0	(1,761)
Unrecognized loss on change in fair value of interest rate swap contracts, net of tax	(98)	(658)
Cumulative foreign currency translation adjustments	1,674	2,274
Accumulated earnings	629,011	592,874
Total stockholders' equity	366,104	326,639
Total liabilities and stockholders' equity	$ 868,980	$ 846,941