XML 97 R86.htm IDEA: XBRL DOCUMENT v3.20.2

Note 17 - Fair Value Measurements (Details Textual)	9 Months Ended
	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Write Down on Other Real Estate Owned	$ 0
Assets, Fair Value Disclosure		$ 126,069,000
Other Real Estate Owned [Member] | Single-Family Residences [Member]
Number of Real Estate Properties	1
Assets, Fair Value Disclosure	$ 293,000

X

- Definition

Represents write down on other real estate owned.

+ References

No definition available.

+ Details

Name:	rbb_WriteDownOnOtherRealEstateOwned
Namespace Prefix:	rbb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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

X

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_InvestmentTypeAxis=rbb_OtherRealEstateOwnedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=rbb_SinglefamilyResidencesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: