XML 115 R105.htm IDEA: XBRL DOCUMENT
v3.10.0.1

LONG-TERM DEBT - Additional Information (Detail) |  |  |  | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 06, 2015 USD ($) | Aug. 15, 2014 $ / shares | May 21, 2014 USD ($) $ / shares shares | Jun. 30, 2018 USD ($) | Dec. 31, 2017 USD ($)
Debt Instrument [Line Items] |  |  |  |  |
Par Value |  |  |  | $ 175,000,000 | $ 175,000,000
Senior Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Redemption period |  |  |  | 90 days |
Minimum redemption period notice required |  |  |  | 30 days |
Maximum redemption period notice required |  |  |  | 60 days |
Redemption price, percentage |  |  |  | 100.00% |
Senior Notes | 5.25% Senior Notes Due April 15, 2025 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Par Value | $ 175,000,000 |  |  | $ 175,000,000 | $ 175,000,000
Stated interest rate | 5.25% |  |  | 5.25% |
Net proceeds from issuance of long term debt | $ 172,800,000 |  |  |  |
Junior Subordinated Debt | 7.50% Amortizing Note Due May 15, 2017 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Stated interest rate |  | 7.50% | 7.50% |  |
Tangible equity units |  |  | $ 69,000,000 |  |
Tangible equity units dividend rate |  | 8.00% | 8.00% |  |
Tangible equity units issued during period (in shares) | shares |  |  | 1,380,000 |  |
Tangible equity units issued to underwriter during period (in shares) | shares |  |  | 180,000 |  |
Tangible equity units, price per share (in dollars per share) | $ / shares |  |  | $ 50.00 |  |
Tangible equity units, convertible, conversion ratio |  |  | 10.604556 |  |
Fair value of debt instrument |  |  | $ 14,600,000 |  |
Adjustments to additional paid in capital, issuance of tangible equity units |  |  | 54,400,000 |  |
Tangible equity units issued, issuance costs |  |  | 4,000,000 |  |
Tangible equity units issued, issuance costs, underwriter discount |  |  | 3,300,000 |  |
Debt instrument, deferred finance cost |  |  | 857,000 |  |
Adjustments to additional paid in capital, tangible equity units issued, issuance costs |  |  | $ 3,200,000 |  |
Equal quarterly cash installments per Amortizing Note |  |  | 1 |  |
Installment payment due on August 15, 2014 per Amortizing Note |  |  | 0.933333 |  |
Tangible equity units issued, stated value per unit (In dollars per unit) | $ / shares |  | $ 50 |  |  |

X
- Definition Adjustments to Additional Paid in Capital, Tangible Equity Units Issued, Value + References No definition available. + Details
Name: | banc_AdjustmentstoAdditionalPaidinCapitalTangibleEquityUnitsIssuedValue
Namespace Prefix: | banc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Debt Instrument, Face Amount Per Note + References No definition available. + Details
Name: | banc_DebtInstrumentFaceAmountPerNote
Namespace Prefix: | banc_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Optional Redemption Period Prior to Maturity + References No definition available. + Details
Name: | banc_DebtInstrumentOptionalRedemptionPeriodPriortoMaturity
Namespace Prefix: | banc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Redemption Period Required Notice, Maximum + References No definition available. + Details
Name: | banc_DebtInstrumentRedemptionPeriodRequiredNoticeMaximum
Namespace Prefix: | banc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Redemption Period Required Notice, Minimum + References No definition available. + Details
Name: | banc_DebtInstrumentRedemptionPeriodRequiredNoticeMinimum
Namespace Prefix: | banc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Payment of Tangible Units Issued, Issuance Costs + References No definition available. + Details
Name: | banc_PaymentofTangibleUnitsIssuedIssuanceCosts
Namespace Prefix: | banc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Payment of Tangible Units Issued, Issuance Costs, Allocated to Debt + References No definition available. + Details
Name: | banc_PaymentofTangibleUnitsIssuedIssuanceCostsAllocatedtoDebt
Namespace Prefix: | banc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Payment of Tangible Units Issued, Issuance Costs, Allocated to Equity + References No definition available. + Details
Name: | banc_PaymentofTangibleUnitsIssuedIssuanceCostsAllocatedtoEquity
Namespace Prefix: | banc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Payment of Tangible Units Issued, Issuance Costs, Underwriter Discount + References No definition available. + Details
Name: | banc_PaymentofTangibleUnitsIssuedIssuanceCostsUnderwriterDiscount
Namespace Prefix: | banc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Tangible Equity Units, Convertible, First Periodic Cash Installments, Rate + References No definition available. + Details
Name: | banc_TangibleEquityUnitsConvertibleFirstPeriodicCashInstallmentsRate
Namespace Prefix: | banc_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tangible Equity Units, Convertible, Periodic Cash Installments, Rate + References No definition available. + Details
Name: | banc_TangibleEquityUnitsConvertiblePeriodicCashInstallmentsRate
Namespace Prefix: | banc_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tangible Equity Units, Issued, Shares + References No definition available. + Details
Name: | banc_TangibleEquityUnitsIssuedShares
Namespace Prefix: | banc_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tangible Equity Units, Issued, Stated Amount Per Unit + References No definition available. + Details
Name: | banc_TangibleEquityUnitsIssuedStatedAmountPerUnit
Namespace Prefix: | banc_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Tangible Equity Units, Issued, Underwriter Overallotment Option + References No definition available. + Details
Name: | banc_TangibleEquityUnitsIssuedUnderwriterOverallotmentOption
Namespace Prefix: | banc_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tangible Equity Units, Issued, Value + References No definition available. + Details
Name: | banc_TangibleEquityUnitsIssuedValue
Namespace Prefix: | banc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Tangible Equity Units, Rate + References No definition available. + Details
Name: | banc_TangibleEquityUnitsRate
Namespace Prefix: | banc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611 + Details
Name: | us-gaap_DebtInstrumentFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
Name: | us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The per share price of the Company's stock at which the contract holder of the freestanding contract has the right to purchase or sell the Company's stock at a future date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 40 -Section 50 -Paragraph 5 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6445032&loc=d3e90205-114008 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=109262807&loc=d3e22047-110879 + Details
Name: | us-gaap_ForwardContractIndexedToIssuersEquityForwardRate
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=banc_FivePointTwoFivePercentSeniorNotesDueApril152025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_JuniorSubordinatedDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=banc_SevenPointFivePercentAmortizingNoteDueMay152017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |