CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income (loss)	$ (1,822)	$ 1,622
Adjustments to reconcile net income to net cash flows from operating activities
Depreciation	2,673	1,683
Amortization	7,522	5,136
Deferred income taxes	3,223	2,868
Stock-based compensation expense	5,618	2,369
Excess tax benefit of stock options exercised	(1,936)	(895)
Other	(1,322)	72
Changes in operating assets and liabilities, net of impact of acquisitions:
Billed and accrued receivables, net	22,793	9,422
Other current and noncurrent assets	(2,026)	(2,420)
Accounts payable	(543)	(2,921)
Accrued employee compensation	(28,412)	(10,564)
Accrued liabilities	(10,181)	(2,995)
Current income taxes	(12,189)	(2,746)
Deferred revenue	3,922	17,894
Other current and noncurrent liabilities	66	(582)
Net cash flows from operating activities	(12,614)	17,943
Cash flows from investing activities:
Purchases of property and equipment	(1,316)	(5,188)
Purchases of software and distribution rights	(776)	(1,844)
Alliance technical enablement expenditures		(256)
Acquisition of businesses, net of cash acquired	(270,948)	(16,729)
Net cash flows from investing activities	(273,040)	(24,017)
Cash flows from financing activities:
Proceeds from issuance of common stock	386	300
Proceeds from exercises of stock options	4,399	1,782
Excess tax benefit of stock options exercised	1,936	895
Repurchases of common stock	(6,241)
Repurchase of restricted stock for tax withholdings	(2,237)	(346)
Repayment of term portion of credit agreement	(3,125)
Payments for debt issuance costs	(553)
Payments on debt and capital leases	(796)	(524)
Net cash flows from financing activities	288,769	2,107
Effect of exchange rate fluctuations on cash	867	1,539
Net increase in cash and cash equivalents	3,982	(2,428)
Cash and cash equivalents, beginning of period	197,098	171,310
Cash and cash equivalents, end of period	201,080	168,882
Supplemental cash flow information
Income taxes paid, net	11,816	7,845
Interest paid	1,740	562
Revolving Credit Facility
Cash flows from financing activities:
Proceeds from credit agreement	95,000
Term Credit Facility
Cash flows from financing activities:
Proceeds from credit agreement	$ 200,000