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Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Cash flows from operating activities: |  |  |
Net income | $ 51,959 | $ 79,758 | $ 53,381
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 35,484 | 39,830 | 39,807
Deferred income taxes | (17,991) | 280 | (1,073)
Asset impairments | 46,530 | 237 | 236
Insurance recovery | (56,152) |  |
Loss on liquidation of subsidiary |  | 315 |
Gain on the sale of property, plant and equipment | (190) | (69) | (9)
Stock-based compensation expense | 5,097 | 5,415 | 5,356
Excess tax shortfall (benefits) from stock-based compensation | 14 | (1,176) |
Changes in operating assets and liabilities, net of effects from business acquisition: |  |  |
Accounts receivable | 27,703 | (40,190) | 6,346
Inventories | (72,666) | (48,008) | 37,029
Prepaid expenses and other assets | 12,087 | (18,480) | (222)
Accounts payable | 28,391 | (16,675) | (14,922)
Accrued liabilities | 2,655 | 5,356 | 3,744
Income taxes | (8,137) | (1,427) | (6,103)
Net cash provided by operations | 54,784 | 5,166 | 123,570
Cash flows from investing activities: |  |  |
Proceeds from sales and redemptions of investments | 11,150 | 10,925 | 3,400
Additions to property, plant and equipment | (71,396) | (35,778) | (22,291)
Proceeds from the sale of property, plant and equipment | 369 | 257 | 315
Additions to purchased software | (601) | (261) | (105)
Purchase of intangible asset |  |  | (11,300)
Business acquisition |  |  | (10,552)
Net cash used in investing activities | (60,478) | (24,857) | (40,533)
Cash flows from financing activities: |  |  |
Proceeds from stock options exercised | 2,571 | 3,252 | 3,602
Excess tax (shortfall) benefits from stock-based compensation | (14) | 1,176 |
Principal payments on capital lease obligations | (363) | (300) | (254)
Share repurchases | (56,281) | (58,855) | (27,919)
Proceeds from exercise of warrants |  |  | 203
Net cash used in financing activities | (54,087) | (54,727) | (24,368)
Effect of exchange rate changes | (2,644) | (480) | 2,880
Net increase (decrease) in cash and cash equivalents | (62,425) | (74,898) | 61,549
Cash and cash equivalents at beginning of year | 346,345 | 421,243 | 359,694
Cash and cash equivalents at end of year | $ 283,920 | $ 346,345 | $ 421,243

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