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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Cash flows from operating activities: |  |  |
Net income (loss) | $ (134,336) | $ (43,053) | $ 150,917
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: |  |  |
Impairment of goodwill and long-lived assets | 35,471 | 0 | 0
Stock-based compensation | 22,546 | 27,996 | 30,548
Depreciation | 13,190 | 11,894 | 10,101
Amortization of intangible assets | 30,345 | 20,191 | 5,066
Non-cash interest expense and amortization of convertible debt issuance costs | 14,695 | 12,622 | 11,075
Deferred tax (benefit) provision | 3,728 | (246) | (73)
Loss (gain) on disposal of property, plant and equipment | 8 | 0 | (153)
Non-cash acquisition of patents | 0 | (3,000) | 0
Loss on sale of marketable security | 0 | 0 | 87
Change in operating assets and liabilities, net of effects of acquisitions: |  |  |
Accounts receivable | 497 | 2,714 | (1,651)
Prepaids and other assets | 8,379 | 8,810 | 4,643
Accounts payable | (9,664) | 10,452 | (3,811)
Accrued salaries and benefits and other accrued liabilities | 1,842 | (783) | 28,050
Accrued litigation expenses | (680) | 6,442 | (1,087)
Income taxes payable | (3,522) | (1,047) | 1,506
Net cash provided by (used in) operating activities | (17,501) | 52,992 | 235,218
Cash flows from investing activities: |  |  |
Acquisition of businesses, net of cash acquired | (46,278) | (167,381) | (17,000)
Purchases of property, plant and equipment | (21,809) | (19,431) | (26,700)
Acquisition of intangible assets | (1,700) | (1,210) | (7,760)
Purchases of marketable securities | (110,716) | (173,996) | (428,768)
Maturities of marketable securities | 183,086 | 337,880 | 296,639
Proceeds from sale of marketable securities | 0 | 33 | 1,829
Proceeds from sale of property, plant and equipment | 0 | 0 | 257
Net cash provided by (used in) investing activities | 2,583 | (24,105) | (181,503)
Cash flows from financing activities: |  |  |
Proceeds received from issuance of common stock under employee stock plans | 4,103 | 12,282 | 16,514
Payments under installment payment arrangement | (1,923) | (2,531) | (4,274)
Principal payments against financing lease obligation | (522) | (456) | 0
Payment to redeem contingently redeemable common stock pursuant to the settlement agreement with Samsung | 0 | (100,000) | 0
Proceeds received from issuance of contingently redeemable common stock and common stock pursuant to the settlement agreement with Samsung | 0 | 0 | 192,000
Proceeds from landlord for tenant improvements | 0 | 8,800 | 292
Repurchase and retirement of common stock, including prepayment under share purchase contract | 0 | 0 | (195,108)
Repayment of convertible senior notes | 0 | 0 | (136,950)
Net cash provided by (used in) financing activities | 1,658 | (81,905) | (127,526)
Net decrease in cash and cash equivalents | (13,260) | (53,018) | (73,811)
Cash and cash equivalents at beginning of year | 162,244 | 215,262 | 289,073
Cash and cash equivalents at end of year | 148,984 | 162,244 | 215,262
Cash paid during the period for: |  |  |
Interest | 8,625 | 8,625 | 8,625
Income taxes, net of refunds | 16,384 | 16,254 | 56,689
Non-cash investing and financing activities: |  |  |
Non-cash obligation for property, plant and equipment | 2,512 | 7,409 | 2,260
Property, plant and equipment received and accrued in accounts payable and other accrued liabilities | 1,709 | 3,093 | 7,714
Intangible assets acquired under installment payment arrangement | 0 | 0 | 500
Common stock, net, issued pursuant to acquisition | $ 0 | $ 86,143 | $ 0

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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 16 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585 + Details
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- Definition The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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