Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)

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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Operating activities:    
Net income $ 25,282 $ 29,260
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 1,822 1,122
Stock-based compensation expense 3,568 3,175
Deferred income taxes 0 (11,915)
Changes in operating assets and liabilities:    
Accounts receivable 4,969 (1,223)
Other current assets (435) 652
Other assets (771) (174)
Deferred revenue (128) (327)
Accounts payable and accrued expenses (1,110) 294
Net cash provided by operating activities 33,197 20,864
Investing activities:    
Sale of short-term investments 4,138 1,581
Purchase of short-term investments (6,233) (4,449)
Sale of long-term investments 6,538 4,873
Purchase of long-term investments (5,852) (5,598)
Release of restricted cash 0 500
Acquisition of property, equipment, and intangibles (4,402) (25,166)
Net cash used in investing activities (5,811) (28,259)
Financing activities:    
Proceeds from exercise of stock options 11,418 5,163
Issuance of common stock under ESPP 1,114 917
Repurchase of common stock (4,311) (19,899)
Net cash provided by (used in) financing activities 8,221 (13,819)
Net increase (decrease) in cash and cash equivalents 35,607 (21,214)
Cash and cash equivalents at beginning of period 29,576 54,087
Cash and cash equivalents at end of period 65,183 32,873
Supplemental Information:    
Capital expenditures accrued but not paid at period end $ 199 $ 644