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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Cash flows from operating activities:    
Net income (loss) $ (6,473) $ 11,422
Adjustments to reconcile net income (loss) to net cash flows from operating activities    
Depreciation 6,129 3,528
Amortization 17,204 10,593
Deferred income taxes (3,019) 6,303
Stock-based compensation expense 9,086 4,533
Excess tax benefit of stock options exercised (2,828) (1,066)
Other (538) 210
Changes in operating assets and liabilities, net of impact of acquisitions:    
Billed and accrued receivables, net 7,509 6,456
Other current and noncurrent assets 2,727 277
Accounts payable 3,172 (3,779)
Accrued employee compensation (27,856) (4,189)
Accrued liabilities (13,278) (5,085)
Current income taxes (13,411) (3,404)
Deferred revenue 3,865 4,569
Other current and noncurrent liabilities (356) (4,884)
Net cash flows from operating activities (18,067) 25,484
Cash flows from investing activities:    
Purchases of property and equipment (3,392) (7,870)
Purchases of software and distribution rights (2,172) (5,288)
Alliance technical enablement expenditures   (256)
Acquisition of businesses, net of cash acquired (275,380) (16,850)
Other investments (1,046)  
Net cash flows from investing activities (281,990) (30,264)
Cash flows from financing activities:    
Proceeds from issuance of common stock 738 628
Proceeds from exercises of stock options 13,806 2,375
Excess tax benefit of stock options exercised 2,828 1,066
Repurchases of common stock (44,064)  
Repurchase of restricted stock for tax withholdings (2,364) (366)
Repayment of term portion of credit agreement (6,250)  
Payments for debt issuance costs (553)  
Payments on debt and capital leases (4,578) (867)
Net cash flows from financing activities 254,563 2,836
Effect of exchange rate fluctuations on cash (1,988) 1,441
Net increase (decrease) in cash and cash equivalents (47,482) (503)
Cash and cash equivalents, beginning of period 197,098 171,310
Cash and cash equivalents, end of period 149,616 170,807
Supplemental cash flow information    
Income taxes paid, net 17,036 11,862
Interest paid 3,891 855
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