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Consolidated Statements of Changes in Stockholders' Equity (USD $)
In Thousands, unless otherwise specified
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Total Bio Rad [Member]
Noncontrolling Interests [Member]
Balance at Dec. 31, 2009 $ 1,279,213              
Balance at Dec. 31, 2009               19,487
Balance at Dec. 31, 2009   3 130,444 0 996,197 133,082 1,259,726  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 185,490       185,490   185,490  
Net Income 1,445             1,445
Net income 186,935              
Other comprehensive income, net of tax           64,938 64,938  
Other comprehensive income, net of tax               2
Other comprehensive income, net of tax 64,940              
Issuance of common stock 12,730   12,730       12,730  
Stock compensation expense 10,201   10,201       10,201  
Tax benefit-exercise stock options 3,161   3,161       3,161  
Purchase of additional controlling interests and other (16,661)   450       450 (17,111)
Balance at Dec. 31, 2010 1,540,519              
Balance at Dec. 31, 2010               3,823
Balance at Dec. 31, 2010   3 156,986 0 1,181,687 198,020 1,536,696  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 178,223       178,223   178,223  
Net Income (200)             (200)
Net income 178,023              
Other comprehensive income, net of tax           670 670  
Other comprehensive income, net of tax               189
Other comprehensive income, net of tax 859              
Issuance of common stock 14,249   14,249       14,249  
Stock compensation expense 10,738   10,738       10,738  
Tax benefit-exercise stock options 3,582   3,582       3,582  
Purchase of additional controlling interests and other (3,588)   (221)       (221) (3,367)
Balance at Dec. 31, 2011 1,744,382              
Balance at Dec. 31, 2011 445             445
Balance at Dec. 31, 2011 1,743,937 3 185,334 0 1,359,910 198,690 1,743,937  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 163,778       163,778   163,778  
Net Income 69             69
Net income 163,847              
Other comprehensive income, net of tax           76,211 76,211  
Other comprehensive income, net of tax               21
Other comprehensive income, net of tax 76,232              
Issuance of common stock 10,611   10,611       10,611  
Stock compensation expense 12,936   12,936       12,936  
Tax benefit-exercise stock options 3,363   3,363       3,363  
Purchase of treasury stock (101)     (101)     (101)  
Balance at Dec. 31, 2012 2,011,270              
Balance at Dec. 31, 2012 535             535
Balance at Dec. 31, 2012 $ 2,010,735 $ 3 $ 212,244 $ (101) $ 1,523,688 $ 274,901 $ 2,010,735