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Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2013
Accounting Policies [Abstract]  
Reconciliation of weighted-average shares used in computing net income per share
Reconciliation of weighted-average shares used in computing basic and diluted net income per share attributable to Micrel, Incorporated shareholders is as follows (in thousands):
 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2013
 
2012
 
2013
 
2012
Weighted average common shares outstanding
58,303

 
60,217

 
58,287

 
60,533

Dilutive effect of stock options and restricted stock units
704

 
620

 
734

 
686

Shares used in computing diluted net income per share
59,007

 
60,837

 
59,021

 
61,219