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Condensed Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Cash flows from operating activities:    
Net loss $ (37,921) $ (22,088)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 3,993 4,908
Loss on goodwill and intangible assets impairments 29,337   
Loss on disposal of fixed assets (13)  
Provision for bad debts 38 22
Inventory provision 251 120
Share-based compensation expense 1,834 1,295
Excess tax benefits from equity based compensation   (50)
Non-cash income tax expense (benefit) 111 (658)
Changes in assets and liabilities:    
Accounts receivable (12,984) 19,406
Inventories (1,247) (12,404)
Prepaid expenses and other assets (1,865) 2,515
Accounts payable (2,683) (25,926)
Accrued expenses, income taxes, and other 2,926 (3,665)
Net cash used in operating activities (18,223) (36,525)
Cash flows from investing activities:    
Purchases of property and equipment (1,170) (1,412)
Purchases of securities (11,145) (10,878)
Securities maturities/sales 5,474 45,644
Net cash provided by (used in) investing activities (6,841) 33,354
Cash flows from financing activities:    
Principal payments under capital lease obligations (29) (28)
Proceeds from stock option exercises net of taxes paid on vested restricted stock units (211) (568)
Excess tax benefits from equity based compensation   50
Net cash used in financing activities (240) (546)
Effect of exchange rates on cash and cash equivalents 15 55
Net decrease in cash and cash equivalents (25,289) (3,662)
Cash and cash equivalents, beginning of period 47,069 17,375
Cash and cash equivalents, end of period 21,780 13,713
Supplemental disclosures of cash flow information:    
Interest 1 2
Income taxes 20   
Supplemental disclosures of non-cash financing activities:    
Marketable equity securities received in settlement of note receivable   $ 384