8. Earnings Per Share

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Earnings Per Share

8.    EARNINGS PER SHARE

Basic earnings per share is computed by dividing net income attributable to Bio-Rad by the weighted average number of common shares outstanding for that period.  Diluted earnings per share takes into account the effect of dilutive instruments, such as stock options and restricted stock, and uses the average share price for the period in determining the number of potential common shares that are to be added to the weighted average number of shares outstanding.  Potential common shares are excluded from the diluted earnings per share calculation if the effect of including such securities would be anti-dilutive.

The weighted average number of common shares outstanding used to calculate basic and diluted earnings per share, and the anti-dilutive shares that are excluded from the diluted earnings per share calculation are as follows (in thousands):

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2014	2013	2014	2013
Basic weighted average shares outstanding	28,826	28,538	28,809	28,516
Effect of potentially dilutive stock options and restricted stock awards	266	330	267	327
Diluted weighted average common shares	29,092	28,868	29,076	28,843
Anti-dilutive shares	107	92	94	92