CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net loss	$ (285)	$ (6,473)
Adjustments to reconcile net loss to net cash flows from operating activities
Depreciation	7,964	6,129
Amortization	23,142	17,204
Provision for doubtful accounts receivable	1,874	1,151
Deferred income taxes	(6,776)	(3,019)
Stock-based compensation expense	7,724	9,086
Excess tax benefit of stock options exercised	(1,681)	(2,828)
Other	2,677	(538)
Changes in operating assets and liabilities, net of impact of acquisitions:
Billed and accrued receivables, net	22,028	6,358
Other current and noncurrent assets	2,046	2,727
Accounts payable	(10,731)	3,172
Accrued employee compensation	(8,012)	(27,856)
Accrued liabilities	(7,997)	(13,278)
Current income taxes	3,780	(13,411)
Deferred revenue	21,737	3,865
Other current and noncurrent liabilities	141	(356)
Net cash flows from operating activities	57,631	(18,067)
Cash flows from investing activities:
Purchases of property and equipment	(9,050)	(3,392)
Purchases of software and distribution rights	(4,578)	(2,172)
Acquisition of businesses, net of cash acquired	(264,202)	(275,380)
Other investments		(1,046)
Net cash flows from investing activities	(277,830)	(281,990)
Cash flows from financing activities:
Proceeds from issuance of common stock	938	738
Proceeds from exercises of stock options	5,583	13,806
Excess tax benefit of stock options exercised	1,681	2,828
Repurchases of common stock	(12,068)	(44,064)
Repurchase of restricted stock and performance shares for tax withholdings	(5,574)	(2,364)
Proceeds from revolver portion of credit agreement		95,000
Proceeds from term portion of credit agreement	300,000	200,000
Repayment of term portion of credit agreement	(13,125)	(6,250)
Payments for debt issuance costs	(9,536)	(553)
Payment of acquired debt	(7,500)
Payments on debt and capital leases	(4,217)	(4,578)
Net cash flows from financing activities	256,182	254,563
Effect of exchange rate fluctuations on cash	(4,571)	(1,988)
Net increase (decrease) in cash and cash equivalents	31,412	(47,482)
Cash and cash equivalents, beginning of period	76,329	197,098
Cash and cash equivalents, end of period	107,741	149,616
Supplemental cash flow information
Income taxes paid, net	7,668	17,036
Interest paid	$ 7,315	$ 3,891