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Income Taxes (Components Of Company's Net Deferred Income Tax Assets And Net Deferred Income Tax Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Deferred income tax assets:    
Tax credit carryforwards $ 2,713 $ 3,390
Net operating loss carryforwards 5,725 1,949
Reserves and allowances 5,927 4,706
Stock options and restricted stock awards 3,174 3,701
Deferred lease revenue 86 280
Senior convertible notes 1,042  
Accrued liabilities 342  
Property, plant and equipment 629  
Total deferred income tax assets 19,638 14,026
Deferred income tax liabilities:    
Senior convertible notes   3,933
Intangibles 32,737 27,041
Property, plant and equipment   90
Accrued liabilities   130
Total deferred income tax liabilities 32,737 31,194
Net deferred income tax assets (liabilities) $ (13,099) $ (17,168)