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Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Cash flows from operating activities: |  |  |
Net income (loss) | $ (23,391) | $ (53,654) | $ 14,062
Adjustments required to reconcile net income (loss) to net cash provided by (used in) operating activities: |  |  |
Depreciation and amortization | 15,030 | 14,393 | 4,712
Stock-based compensation expense | 5,460 | 6,564 | 4,207
Accrued severance pay and pensions, net | (488) | (1,125) | 358
Decrease (increase) in accrued interest and exchange rate on bank deposits | 84 | (271) | (276)
Accrued interest and amortization of premium on marketable securities | (323) | 647 | 144
(Increase) in trade receivables, net | (9,459) | (3,342) | (19,622)
Decrease (increase) in other accounts receivable and prepaid expenses | (2,294) | 6,782 | (7,607)
Decrease in inventories, net of write-off | 27,210 | 40,643 | 4
Increase (decrease) in trade payables | 24,986 | (3,753) | (11,670)
Increase (decrease) in deferred revenues | (21,589) | (11,925) | 2,113
Increase in deferred tax asset, net | (743) | (1,237) | (469)
Increase (decrease) in other accounts payable and accrued expenses (including other long term liabilities) | (7,274) | (13,847) | 3,347
Net cash provided by (used in) operating activities | 7,209 | (20,125) | (10,697)
Cash flows from investing activities: |  |  |
Purchase of property and equipment | (14,530) | (14,447) | (9,798)
Payment of business acquired, net of cash (Schedule A) |  | (42,405) | (1,232)
Investment in short and long-term bank deposits | (1,266) | (7,304) | (13,754)
Proceeds from maturities of short and long-term bank deposits | 7,920 | 25,664 | 31,680
Investment in marketable securities | (64) |  | (18,339)
Proceeds from maturities of marketable securities |  | 4,258 | 16,591
Proceeds from sale of marketable securities | 9,781 | 6,201 |
Net cash provided by (used in) investing activities | 1,841 | (28,033) | 5,148
Cash flows from financing activities: |  |  |
Proceeds from Financial institutions, net | 27,000 | 35,000 |
Repayment of long-term loans | (18,232) |  |
Proceeds from exercise of options | 736 | 4,474 | 4,935
Net cash provided by financing activities | 9,504 | 39,474 | 4,935
Effect of exchange rate changes on cash | (446) | (50) |
Increase (decrease) in cash and cash equivalents | 18,108 | (8,734) | (614)
Cash and cash equivalents at the beginning of the year | 28,991 | 37,725 | 38,339
Cash and cash equivalents at the end of the year | 47,099 | 28,991 | 37,725
Supplemental disclosures of non cash financing and investing activities: |  |  |
Purchase of property and equipment | 140 | 617 | 672
Supplemental disclosure of cash flow information: |  |  |
Cash paid during the year for income taxes | 2,326 | 3,849 | 856
Cash paid during the year for interest | 2,113 | 1,029 |
Estimated net fair value of assets acquired and liabilities assumed at the date of acquisition was as follows: |  |  |
Working capital, net (excluding cash and cash equivalents) |  | 44,551 | 132
Property, plant and equipment |  | 9,500 | 7
Other long-term assets |  | 8,581 |
Goodwill and other intangible assets |  | 31,358 | 1,093
Deferred income taxes, net |  | 3,550 |
Long-term liabilities |  | (55,135) |
Estimated net fair value of assets acquired and liabilities assumed |  | $ 42,405 | $ 1,232

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