SEGMENT INFORMATION - Narrative (Details)	3 Months Ended
Mar. 31, 2019 filling_facility
Segment Reporting [Abstract]
Number of filling facilities	2
Percentage decrease of chlorides released in environment	75.00%

Percentage of amount of chlorides released into the environment reduced when compared to potassium chloride.

No definition available.

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