v3.10.0.1

INVESTMENT SECURITIES (Details 3) $ in Thousands	Jun. 30, 2018 USD ($)
Amortized Cost
Due over one year through five years	$ 1,000
Due over five years through ten years	11,000
Due after ten years	1,990
Mortgage-backed securities	18,753
Total - Amortized Cost	32,743
Fair Value
Due over one year through five years	966
Due over five years through ten years	10,327
Due after ten years	1,848
Mortgage-backed securities	18,190
Total - Fair Value	$ 31,331

Amount of investment securities at fair value maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

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Namespace Prefix:	mbcq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of investment debt securities at fair value maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

Name:	mbcq_InvestmentSecuritiesAfterOneThroughFiveYearsFairValue
Namespace Prefix:	mbcq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of investment securities at fair value maturing after the tenth fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

Name:	mbcq_InvestmentSecuritiesAfterTenYearsFairValue
Namespace Prefix:	mbcq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the amount related to amortized cost of investment securities.

+ References

No definition available.

+ Details

Name:	mbcq_InvestmentSecuritiesAmortizedCost
Namespace Prefix:	mbcq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the amount related to fair value of investment securities.

+ References

No definition available.

+ Details

Name:	mbcq_InvestmentSecuritiesFairValue
Namespace Prefix:	mbcq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	mbcq_InvestmentSecuritiesFairValueAbstract
Namespace Prefix:	mbcq_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the cost of investment securities, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, maturing in the fifth through tenth fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

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Namespace Prefix:	mbcq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the cost of investment securities, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, maturing in the next fiscal year through the fifth fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

Name:	mbcq_InvestmentSecuritiesMaturitiesAfterOneThroughFiveYearsAmortizedCost
Namespace Prefix:	mbcq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the cost of investment securities, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, maturing after the tenth fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

Name:	mbcq_InvestmentSecuritiesMaturitiesAfterTenYearsAmortizedCost
Namespace Prefix:	mbcq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	mbcq_InvestmentSecuritiesMaturitiesAmortizedCostAbstract
Namespace Prefix:	mbcq_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of investment securities at cost, net of adjustments, that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the cost over several maturity groupings.

+ References

No definition available.

+ Details

Name:	mbcq_InvestmentSecuritiesWithoutSingleMaturityDateAmortizedCost
Namespace Prefix:	mbcq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of investment securities at fair value that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the fair value over several maturity groupings.

+ References

No definition available.

+ Details

Name:	mbcq_InvestmentSecuritiesWithoutSingleMaturityDateFairValue
Namespace Prefix:	mbcq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

MB Bancorp Inc 10-Q