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Fair Value Measurements - Assets Measured at Fair Value, Non-Recurring (Details) (Non-recurring basis, USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Estimate of Fair Value | Impaired loans at fair value - Real estate loans |  |
Assets: |  |
Assets | $ 18,746 | $ 4,443
Estimate of Fair Value | Impaired loans at fair value - Commercial business |  |
Assets: |  |
Assets | 2,383 | 1,164
Estimate of Fair Value | Loans held for sale, net |  |
Assets: |  |
Assets | 6,900 | 803
Estimate of Fair Value | Other real estate owned |  |
Assets: |  |
Assets | 4,003 | 2,636
Quoted Prices in Active Markets for Identical Assets (Level 1) | Impaired loans at fair value - Real estate loans |  |
Assets: |  |
Assets | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Impaired loans at fair value - Commercial business |  |
Assets: |  |
Assets | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Loans held for sale, net |  |
Assets: |  |
Assets | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other real estate owned |  |
Assets: |  |
Assets | 0 | 0
Significant Other Observable Inputs (Level 2) | Impaired loans at fair value - Real estate loans |  |
Assets: |  |
Assets | 18,746 | 4,443
Significant Other Observable Inputs (Level 2) | Impaired loans at fair value - Commercial business |  |
Assets: |  |
Assets | 2,383 | 1,164
Significant Other Observable Inputs (Level 2) | Loans held for sale, net |  |
Assets: |  |
Assets | 6,900 | 803
Significant Other Observable Inputs (Level 2) | Other real estate owned |  |
Assets: |  |
Assets | 4,003 | 2,636
Significant Unobservable Inputs (Level 3) | Impaired loans at fair value - Real estate loans |  |
Assets: |  |
Assets | 0 | 0
Significant Unobservable Inputs (Level 3) | Impaired loans at fair value - Commercial business |  |
Assets: |  |
Assets | 0 | 0
Significant Unobservable Inputs (Level 3) | Loans held for sale, net |  |
Assets: |  |
Assets | 0 | 0
Significant Unobservable Inputs (Level 3) | Other real estate owned |  |
Assets: |  |
Assets | 0 | 0
Total Gains (Losses) | Impaired loans at fair value - Real estate loans |  |
Assets: |  |
Total gains (losses) | (9,892) | 1,169
Total Gains (Losses) | Impaired loans at fair value - Commercial business |  |
Assets: |  |
Total gains (losses) | (6,100) | (3,809)
Total Gains (Losses) | Loans held for sale, net |  |
Assets: |  |
Total gains (losses) | (530) | (2,004)
Total Gains (Losses) | Other real estate owned |  |
Assets: |  |
Total gains (losses) | $ (2,360) | $ (2,786)

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- Definition Total Gains Losses Fair Value Disclosure + References No definition available. + Details
Name: | bbcn_TotalGainsLossesFairValueDisclosure
Namespace Prefix: | bbcn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_AssetsFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
Name: | us-gaap_AssetsFairValueDisclosureNonrecurring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant