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Business Acquisition Purchase Price Allocation Assets Acquired Bank Stock

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Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Acquiree Shares Exchanged, Number of Shares

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Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Number of Shares

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Business Combination, Consideration Transferred, Number of Shares Acquired

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Business Combination, Consideration Transferred, Number of Unredeemed Shares

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Business Combination, Number of Acquired Bank Branches

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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Real Estate Owned

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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debenture

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Business Combination Shares Issued, Fractional Share Conversion Per One Share of Acquiror

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Business Combination Shares Issued, Fractional Share Conversion Price, Per One Share of Acquiree

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Redemption of Acquired Preferred Stock

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For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the fair value of the receivables acquired, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of investments in debt and equity securities, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of other liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.

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Amount of deferred tax asset attributable to deductible temporary differences and carryforwards that are expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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Amount of long-term debt due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Business Combinations - Purchase price allocation (Details) (USD $) In Thousands, except Share data, unless otherwise specified				0 Months Ended			0 Months Ended		0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Aug. 14, 2013 Foster Bankshares Inc	Dec. 31, 2013 Foster Bankshares Inc	Aug. 12, 2013 Foster Bankshares Inc	Feb. 15, 2013 Pacific International Bancorp, Inc.	Feb. 13, 2013 Pacific International Bancorp, Inc.	Aug. 14, 2013 Common Stock Foster Bankshares Inc	Feb. 15, 2013 Preferred Stock Pacific International Bancorp, Inc.	Dec. 31, 2013 Common Stock Foster Bankshares Inc	Aug. 12, 2013 Illinois Foster Bankshares Inc branch	Aug. 12, 2013 Virginia Foster Bankshares Inc branch
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Number of acquired bank branches												8	1
Conversion factor per one share of acquiree (in dollars per share)						34.6703
Conversion factor per one share of acquiror						2.62771
Number of shares issued in exchange for acquired company											180,300
Number of acquiree shares exchanged											68,619
Number of acquiree shares					58,906
Number of unredeemed acquiree shares					4,475
Consideration paid:
BBCN common stock issued				$ 2,567			$ 8,437
Cash paid for the redemption common stock							1		1,922
Liability for unredeemed common stock									276
Redemption of Preferred Stock										7,475
Total consideration paid				4,765			15,913
Assets Acquired:
Cash and cash equivalents						42,883		25,968
Investment securities available for sale						4,844		7,810
Loans, net						255,297		131,589
FRB and FHLB stock						1,714		1,829
OREO						14,251		3,418
Premises and equipment						4,733
Core deposit intangibles						21,211		604
Deferred tax assets, net						2,763		9,886
Other assets						2,353		2,514
Liabilities Assumed:
Deposits						(321,596)		(143,665)
Borrowings						(18,045)		(14,698)
Subordinated debentures						(15,309)		(4,108)
Other liabilities						(5,859)		(5,116)
Total identifiable net assets						(10,760)		16,031
Goodwill	$ 105,401	$ 89,878	$ 90,473			$ 15,525