EQUITY-METHOD INVESTMENT (Details) $ in Thousands	6 Months Ended
Jun. 30, 2016 USD ($)
Schedule of Equity Method Investments [Line Items]
Percentage of production offtake	67.00%
Percentage of operating expenses to be absorbed	67.00%
St. Gabriel CC Company, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage in joint venture	50.00%
Carrying value of joint venture	$ 1,546
St. Gabriel CC Company, LLC [Member] \| Eastman Chemical Company [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage in joint venture	50.00%

Refers to the percentage of operating expenses to be absorbed.

No definition available.

Name:	bcpc_PercentageOfOperatingExpensesToBeAbsorbed
Namespace Prefix:	bcpc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Refers to the percentage of production offtake.

+ References

No definition available.

+ Details

Name:	bcpc_PercentageOfProductionOfftake
Namespace Prefix:	bcpc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66022249&loc=d3e33749-111570

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_EquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=bcpc_StGabrielCCCompanyLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CounterpartyNameAxis=bcpc_EastmanChemicalCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: