Annual report pursuant to Section 13 and 15(d)

Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details)

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Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Taxes [Abstract]      
Computed "expected" income tax expense (benefit) (34.00%) (34.00%) (34.00%)
Foreign taxes 1.40% 0.60% 4.20%
State income taxes, net of federal income taxes 0.30% (1.70%) (0.70%)
Income Tax credits (3.30%) (0.90%) (3.70%)
Incentive Stock options 0.50% 0.40% 0.90%
Change in effective state rate 0.10% 1.00%  
Foreign sourced unearned income   1.70%  
Undistributed earnings of foreign subsidiaries 8.40% 3.50%  
Impairment of goodwill 24.80%    
Other (1.10%) (0.20%) 0.50%
Decrease in valuation allowance 117.00% 1.20%  
Income tax benefit 114.10% (28.40%) (32.80%)