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Subordinated Debentures - Narrative (Details) (USD $) | 9 Months Ended |  |  |
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Sep. 30, 2014 | Sep. 30, 2014 Other assets | Dec. 31, 2013 Other assets | Sep. 30, 2014 Trust Preferred Securities Subject to Mandatory Redemption | Sep. 30, 2014 Maximum Trust Preferred Securities Subject to Mandatory Redemption | Sep. 30, 2014 Nara Bancorp Grantor Trust grantor_trust | Sep. 30, 2014 Nara Bancorp Grantor Trust Trust Preferred Securities Subject to Mandatory Redemption | Sep. 30, 2014 Center Financial Corporation Grantor Trust grantor_trust | Sep. 30, 2014 Center Financial Corporation Grantor Trust Trust Preferred Securities Subject to Mandatory Redemption | Sep. 30, 2014 PIB Trust I grantor_trust | Sep. 30, 2014 PIB Trust I Trust Preferred Securities Subject to Mandatory Redemption | Sep. 30, 2014 Foster Capital Trust I grantor_trust | Sep. 30, 2014 Foster Capital Trust I Trust Preferred Securities Subject to Mandatory Redemption
Subordinated Borrowing [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of grantor trusts issuing securities |  |  |  |  |  | 4 |  | 1 |  | 1 |  | 1 |
Trust Preferred Security Amount |  |  |  | $ 46,000,000 |  |  | $ 28,000,000 |  | $ 18,000,000 |  | $ 4,000,000 |  | $ 15,000,000
Right to defer consecutive payments of interest, maximum term | 5 years |  |  |  |  |  |  |  |  |  |  |  |
Investment in common trust securities |  | 1,600,000 | 1,900,000 |  |  |  |  |  |  |  |  |  |
Percent included in tier one capital, maximum |  |  |  | 25.00% |  |  |  |  |  |  |  |  |
Excess of percent threshold included in tier two capital |  |  |  | 25.00% |  |  |  |  |  |  |  |  |
Tier one risk based capital |  |  |  | $ 40,700,000 | $ 15,000,000,000 |  |  |  |  |  |  |  |

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- Definition Debt Issuance To Capital, Excess Of Percent Threshold, Included in Tier Two Capital + References No definition available. + Details
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- Definition Debt Issuance To Capital, Percent Included in Tier One Capital, Maximum + References No definition available. + Details
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- Definition Investment in Common Trust Securities + References No definition available. + Details
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- Definition Number of Grantor Trusts Issuing Securities + References No definition available. + Details
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- Definition Subordinated Borrowing, Right to Defer Consecutive Payments of Interest Term, Maximum + References No definition available. + Details
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- Definition Trust Preferred Security Amount + References No definition available. + Details
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- Details
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- Definition Tier 1 Risk Based Capital as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7881181&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958568-112826 + Details
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