XML 130 R64.htm IDEA: XBRL DOCUMENT
v3.20.1

Loans - Summary of Recorded Investment in Loans Impairment Method and Activity in Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Allowance for loan losses: |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses, Beginning balance |  |  |  | $ 17,577 |  |  |  | $ 13,773 | $ 17,577 | $ 13,773 | $ 14,162
Allowance for loan losses, Provisions | $ 659 | $ 824 | $ 357 | 550 | $ 1,890 | $ 1,695 | $ 700 | 184 | 2,390 | 4,469 | (1,053)
Allowance for loan losses, Charge-offs |  |  |  |  |  |  |  |  | (1,259) | (701) | (83)
Allowance for loan losses, Recoveries |  |  |  |  |  |  |  |  | 108 | 36 | 747
Allowance for loan losses, Ending balance | 18,816 |  |  |  | 17,577 |  |  |  | 18,816 | 17,577 | 13,773
Reserves: |  |  |  |  |  |  |  |  |  |  |
Loan losses, Reserves | 18,816 |  |  |  | 17,577 |  |  |  | 18,816 | 17,577 | 13,773
Loans evaluated for impairment: |  |  |  |  |  |  |  |  |  |  |
Loans, Individually evaluated for impairment | 13,218 |  |  |  | 3,281 |  |  |  | 13,218 | 3,281 | 2,575
Loans, Collectively evaluated for impairment | 2,183,716 |  |  |  | 2,138,734 |  |  |  | 2,183,716 | 2,138,734 | 1,246,184
Total loans, net of deferred loan fees | 2,196,934 |  |  |  | 2,142,015 |  |  |  | 2,196,934 | 2,142,015 | 1,249,074
Loans acquired | 2,300,000 |  |  |  |  |  |  |  | 2,300,000 |  |
Loans Acquired with Deteriorated Credit Quality |  |  |  |  |  |  |  |  |  |  |
Loans evaluated for impairment: |  |  |  |  |  |  |  |  |  |  |
Loans acquired |  |  |  |  |  |  |  |  |  |  | 315
Specific Reserves |  |  |  |  |  |  |  |  |  |  |
Reserves: |  |  |  |  |  |  |  |  |  |  |
Loan losses, Reserves |  |  |  |  | 44 |  |  |  |  | 44 |
General Reserves |  |  |  |  |  |  |  |  |  |  |
Reserves: |  |  |  |  |  |  |  |  |  |  |
Loan losses, Reserves | 18,816 |  |  |  | 17,533 |  |  |  | 18,816 | 17,533 | 13,773
Real Estate |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses: |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses, Beginning balance |  |  |  | 13,437 |  |  |  | 9,309 | 13,437 | 9,309 | 8,111
Allowance for loan losses, Provisions |  |  |  |  |  |  |  |  | 1,847 | 4,128 | 1,198
Allowance for loan losses, Charge-offs |  |  |  |  |  |  |  |  | (166) |  |
Allowance for loan losses, Ending balance | 15,118 |  |  |  | 13,437 |  |  |  | 15,118 | 13,437 | 9,309
Reserves: |  |  |  |  |  |  |  |  |  |  |
Loan losses, Reserves | 15,118 |  |  |  | 13,437 |  |  |  | 15,118 | 13,437 | 9,309
Loans evaluated for impairment: |  |  |  |  |  |  |  |  |  |  |
Loans, Individually evaluated for impairment | 3,795 |  |  |  | 2,309 |  |  |  | 3,795 | 2,309 | 2,420
Loans, Collectively evaluated for impairment | 1,842,747 |  |  |  | 1,750,896 |  |  |  | 1,842,747 | 1,750,896 | 834,152
Total loans, net of deferred loan fees | 1,846,542 |  |  |  | 1,753,205 |  |  |  | 1,846,542 | 1,753,205 | 836,887
Real Estate | Loans Acquired with Deteriorated Credit Quality |  |  |  |  |  |  |  |  |  |  |
Loans evaluated for impairment: |  |  |  |  |  |  |  |  |  |  |
Loans acquired |  |  |  |  |  |  |  |  |  |  | 315
Real Estate | General Reserves |  |  |  |  |  |  |  |  |  |  |
Reserves: |  |  |  |  |  |  |  |  |  |  |
Loan losses, Reserves | 15,118 |  |  |  | 13,393 |  |  |  | 15,118 | 13,393 | 9,309
Commercial |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses: |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses, Beginning balance |  |  |  | $ 4,140 |  |  |  | 4,044 | 4,140 | 4,044 | 6,051
Allowance for loan losses, Provisions |  |  |  |  |  |  |  |  | 433 | 761 | (2,671)
Allowance for loan losses, Charge-offs |  |  |  |  |  |  |  |  | (1,093) | (701) | (83)
Allowance for loan losses, Recoveries |  |  |  |  |  |  |  |  | 108 | 36 | 747
Allowance for loan losses, Ending balance | 3,588 |  |  |  | 4,140 |  |  |  | 3,588 | 4,140 | 4,044
Reserves: |  |  |  |  |  |  |  |  |  |  |
Loan losses, Reserves | 3,588 |  |  |  | 4,140 |  |  |  | 3,588 | 4,140 | 4,044
Loans evaluated for impairment: |  |  |  |  |  |  |  |  |  |  |
Loans, Individually evaluated for impairment | 9,423 |  |  |  | 972 |  |  |  | 9,423 | 972 | 155
Loans, Collectively evaluated for impairment | 340,148 |  |  |  | 387,838 |  |  |  | 340,148 | 387,838 | 412,032
Total loans, net of deferred loan fees | 349,571 |  |  |  | 388,810 |  |  |  | 349,571 | 388,810 | 412,187
Commercial | Specific Reserves |  |  |  |  |  |  |  |  |  |  |
Reserves: |  |  |  |  |  |  |  |  |  |  |
Loan losses, Reserves |  |  |  |  | 44 |  |  |  |  | 44 |
Commercial | General Reserves |  |  |  |  |  |  |  |  |  |  |
Reserves: |  |  |  |  |  |  |  |  |  |  |
Loan losses, Reserves | 3,588 |  |  |  | $ 4,140 |  |  |  | 3,588 | 4,140 | 4,044
Other |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses: |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses, Provisions |  |  |  |  |  |  |  |  | 9 |  |
Allowance for loan losses, Ending balance | 9 |  |  |  |  |  |  |  | 9 |  |
Reserves: |  |  |  |  |  |  |  |  |  |  |
Loan losses, Reserves | 9 |  |  |  |  |  |  |  | 9 |  |
Loans evaluated for impairment: |  |  |  |  |  |  |  |  |  |  |
Loans, Collectively evaluated for impairment | 821 |  |  |  |  |  |  |  | 821 |  |
Total loans, net of deferred loan fees | 821 |  |  |  |  |  |  |  | 821 |  |
Other | General Reserves |  |  |  |  |  |  |  |  |  |  |
Reserves: |  |  |  |  |  |  |  |  |  |  |
Loan losses, Reserves | 9 |  |  |  |  |  |  |  | 9 |  |
Unallocated |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses: |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses, Beginning balance |  |  |  |  |  |  |  | $ 420 |  | 420 |
Allowance for loan losses, Provisions |  |  |  |  |  |  |  |  | 101 | $ (420) | 420
Allowance for loan losses, Ending balance | 101 |  |  |  |  |  |  |  | 101 |  | 420
Reserves: |  |  |  |  |  |  |  |  |  |  |
Loan losses, Reserves | 101 |  |  |  |  |  |  |  | 101 |  | 420
Unallocated | General Reserves |  |  |  |  |  |  |  |  |  |  |
Reserves: |  |  |  |  |  |  |  |  |  |  |
Loan losses, Reserves | $ 101 |  |  |  |  |  |  |  | $ 101 |  | $ 420

X
- Definition Allowance for credit losses reserve change in method of calculating impairment. + References No definition available. + Details
Name: | rbb_AllowanceForCreditLossesReserveChangeInMethodOfCalculatingImpairment
Namespace Prefix: | rbb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Allowance for loan and lease losses reserves. + References No definition available. + Details
Name: | rbb_AllowanceForLoanAndLeaseLossesReservesAbstract
Namespace Prefix: | rbb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LoanAndLeaseReceivablesImpairedAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 + Details
Name: | us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5074-111524 + Details
Name: | us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919230-210447 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 + Details
Name: | us-gaap_NotesReceivableNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of expense related to estimated loss from loan and lease transactions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
Name: | us-gaap_ProvisionForLoanAndLeaseLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_CreditLossStatusAxis=us-gaap_FinancialAssetAcquiredWithCreditDeteriorationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationAllowancesAndReservesTypeAxis=rbb_SpecificReserveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationAllowancesAndReservesTypeAxis=rbb_GeneralReserveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=rbb_OtherFinancingReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_UnallocatedFinancingReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |