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INVESTMENTS AVAILABLE FOR SALE (Details Textual) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Gain On Investments, Pretax Recognised	$ 3,000	$ 0

X

- Definition

Amount of gain or loss earned on investments that is recognised before tax.

+ References

No definition available.

+ Details

Name:	bcml_GainlossOnInvestmentsPretaxRecognised
Namespace Prefix:	bcml_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration