v2.4.0.8
Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income $ 44,273 $ 66,836 $ 62,492
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 15,623 11,564 6,989
Amortization of investment premiums 11,634 12,962 12,515
Stock-based compensation expense 43,909 30,690 19,015
Excess tax benefit from employee stock option plans (2,974) (12,069) (19,829)
Other non-cash items, net 961 881 22
Changes in operating assets and liabilities:      
Accounts receivable—net (22,080) (12,120) (23,246)
Inventory (35,093) (11,303) (6,034)
Deferred tax assets (18,750) (9,254) (7,874)
Prepaid expenses and other current assets (907) 791 (2,915)
Other assets 1,243 2,470 227
Accounts payable 10,485 961 6,801
Accrued liabilities 1,654 301 1,765
Accrued payroll and compensation 6,013 4,599 4,773
Deferred revenue 68,871 68,292 42,177
Income taxes payable 22,522 28,265 35,964
Net cash provided by operating activities 147,384 183,866 132,842
CASH FLOWS FROM INVESTING ACTIVITIES:      
Purchase of investments (552,778) (601,087) (516,906)
Sales of investments 57,897 26,268 44,503
Maturities of investments 369,659 415,440 311,824
Purchases of property and equipment (13,877) (22,083) (3,624)
Payments made in connection with acquisitions, net of cash acquired (7,635) (1,249) (2,623)
Net cash used in investing activities (146,734) (182,711) (166,826)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Proceeds from issuance of common stock 25,584 38,087 19,968
Taxes paid related to net share settlement of equity awards (1,452) 0 0
Excess tax benefit from stock-based compensation 2,974 12,069 19,829
Repurchase and retirement of common stock (33,529) 0 0
Net cash (used in) provided by financing activities (6,423) 50,156 39,797
EFFECT OF EXCHANGE RATES ON CASH AND CASH EQUIVALENTS (1,329) (326) (682)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS (7,102) 50,985 5,131
CASH AND CASH EQUIVALENTS—Beginning of year 122,975 71,990 66,859
CASH AND CASH EQUIVALENTS—End of year 115,873 122,975 71,990
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:      
Cash paid (refunded) for income taxes, net 25,445 17,088 (305)
NON-CASH INVESTING AND FINANCING ACTIVITIES:      
Purchase of property and equipment not yet paid 4,253 398 440
Liability incurred in connection with business acquisition 100 201 0
Liability incurred for repurchase of common stock $ 5,420 $ 0 $ 0