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Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Mar. 31, 2011
Income Taxes [Abstract]    
Net operating loss carryforwards $ 225,640 $ 194,216
Research and development and other tax credit carryforwards 9,251 9,324
Accruals and reserves 39,101 45,917
Fixed assets and intangible assets 2,316 3,042
Other 19,007 20,277
Gross deferred tax assets 295,315 272,776
Valuation allowance (252,302) (220,596)
Total deferred tax assets 43,013 52,180
Intangible assets from acquisitions   (378)
Intercompany debt (35,185) (33,872)
Other (7,828) (17,930)
Total deferred tax liabilities (43,013) (52,180)
Net deferred tax assets