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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Cash flows from operating activities:    
Net income (loss) $ (818) $ 21,961
Adjustments to reconcile net income (loss) to net cash flows from operating activities    
Depreciation 9,688 5,529
Amortization 27,145 15,813
Provision for doubtful accounts receivable (1,266) 613
Deferred income taxes (7,767) 7,098
Stock-based compensation expense 11,661 6,691
Excess tax benefit of stock options exercised (3,378) (1,326)
Other 317 333
Changes in operating assets and liabilities, net of impact of acquisitions:    
Billed and accrued receivables (11,265) 8,016
Other current and noncurrent assets 3,480 2,179
Accounts payable 16 (4,658)
Accrued employee compensation (26,289) 133
Accrued liabilities (9,967) (1,524)
Current income taxes (11,546) (6,424)
Deferred revenue 9,654 4,184
Other current and noncurrent liabilities (2,407) (6,383)
Net cash flows from operating activities (12,742) 52,235
Cash flows from investing activities:    
Purchases of property and equipment (10,032) (9,310)
Purchases of software and distribution rights (3,558) (6,590)
Alliance technical enablement expenditures   (256)
Acquisition of businesses, net of cash acquired (325,232) (16,850)
Purchase of available-for-sale equity securities   (10,000)
Other investments (1,046)  
Net cash flows from investing activities (339,868) (43,006)
Cash flows from financing activities:    
Proceeds from issuance of common stock 1,028 968
Proceeds from exercises of stock options 15,059 2,780
Excess tax benefit of stock options exercised 3,378 1,326
Repurchases of common stock (57,836)  
Repurchase of restricted stock for tax withholdings (2,942) (678)
Proceeds from exercises of common stock warrants 11,866  
Cash settlement of common stock warrants (29,596)  
Proceeds from revolver portion of credit agreement 119,000 75,000
Proceeds from term portion of credit agreement 200,000  
Repayment of revolving credit facility   (75,000)
Repayment of term portion of credit agreement (9,375)  
Payments for debt issuance costs (1,094)  
Payments on debt and capital leases (5,783) (3,270)
Net cash flows from financing activities 243,705 1,126
Effect of exchange rate fluctuations on cash (511) (1,965)
Net increase (decrease) in cash and cash equivalents (109,416) 8,390
Cash and cash equivalents, beginning of period 197,098 171,310
Cash and cash equivalents, end of period 87,682 179,700
Supplemental cash flow information    
Income taxes paid, net 21,434 16,538
Interest paid $ 5,957 $ 1,219