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Condensed Consolidated Balance Sheets Parenthetical	Mar. 31, 2015	Dec. 31, 2014
Common Class A [Member]
Common Stock, Shares, Issued	24,016,121us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	23,971,808us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Common Stock, Shares, Outstanding	24,015,999us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	23,971,686us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Common Class B [Member]
Common Stock, Shares, Issued	5,118,745us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember	5,098,799us-gaap_CommonStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Common Stock, Shares, Outstanding	5,117,828us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember	5,097,882us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Treasury Class A [Member]
Treasury Stock, Shares	122us-gaap_TreasuryStockShares / us-gaap_StatementClassOfStockAxis = bio_TreasuryClassAMember	122us-gaap_TreasuryStockShares / us-gaap_StatementClassOfStockAxis = bio_TreasuryClassAMember
Treasury Class B [Member]
Treasury Stock, Shares	917us-gaap_TreasuryStockShares / us-gaap_StatementClassOfStockAxis = bio_TreasuryClassBMember	917us-gaap_TreasuryStockShares / us-gaap_StatementClassOfStockAxis = bio_TreasuryClassBMember

X

- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

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-Name Regulation S-X (SX)

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-Section 02

-Paragraph 30

-Article 5

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X

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 505

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- Definition

Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Topic 210

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-Section S99

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