SEGMENT INFORMATION (Details)	12 Months Ended
Dec. 31, 2017 Facility
SEGMENT INFORMATION [Abstract]
Number of filing 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