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PARENT COMPANY FINANCIAL STATEMENTS (Details) (USD $) In Thousands, except Share data, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2008
--- | --- | --- | --- | ---
ASSETS |  |  |  |
Cash and cash equivalents | $ 1,431,185 | $ 1,333,949 | $ 1,099,084 | $ 878,853
Investment securities available-for-sale | 3,072,578 | 2,875,941 |  |
Other assets | 500,640 | 288,182 |  |
TOTAL | 21,968,667 | 20,700,537 | 20,559,212 |
LIABILITIES AND STOCKHOLDERS' EQUITY |  |  |  |
Long-term debt | 212,178 | 235,570 |  |
Total liabilities | 19,656,924 | 18,586,606 |  |
STOCKHOLDERS' EQUITY |  |  |  |
Preferred stock, $0.001 par value, 5,000,000 shares authorized; Series A, non-cumulative convertible, 200,000 shares issued and 85,710 and 85,741 shares outstanding in 2011 and 2010, respectively. | 83,027 | 83,058 |  |
Preferred stock, par value (in dollars per share) | $ 0.001 | $ 0.001 |  |
Preferred stock, shares authorized | 5,000,000 | 5,000,000 |  |
Common stock, $0.001 par value, 200,000,000 shares authorized; 156,798,011 and 155,743,241 shares issued in 2011 and 2010, respectively; 149,327,907 and 148,542,940 shares outstanding in 2011 and 2010, respectively. | 157 | 156 |  |
Common stock, par value (in dollars per share) | $ 0.001 | $ 0.001 |  |
Common stock, shares authorized | 200,000,000 | 200,000,000 |  |
Common stock, shares issued | 156,798,011 | 155,743,241 |  |
Common stock, shares outstanding | 149,327,907 | 148,542,940 |  |
Additional paid in capital | 1,443,883 | 1,434,277 |  |
Retained earnings | 934,617 | 720,116 |  |
Treasury stock, at cost - 7,470,104 shares in 2011 and 7,200,301 shares in 2010. | (116,001) | (111,262) |  |
Treasury stock, shares | 7,470,104 | 7,200,301 |  |
Accumulated other comprehensive (loss) income, net of tax | (33,940) | (12,414) |  |
Total stockholders' equity | 2,311,743 | 2,113,931 | 2,284,659 | 1,550,766
TOTAL | 21,968,667 | 20,700,537 |  |
Preferred stock, Series A, non-cumulative convertible |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Preferred stock, $0.001 par value, 5,000,000 shares authorized; Series A, non-cumulative convertible, 200,000 shares issued and 85,710 and 85,741 shares outstanding in 2011 and 2010, respectively. | 83,027 | 83,058 |  |
Preferred stock, par value (in dollars per share) | $ 0.001 | $ 0.001 |  |
Preferred stock, shares authorized | 5,000,000 | 5,000,000 |  |
Preferred stock, shares issued | 200,000 | 200,000 |  |
Preferred stock, shares outstanding | 85,710 | 85,741 |  |
East West Bancorp, Inc. |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents | 9,287 | 4,973 | 206,207 | 14,015
Certificates of deposit |  | 198 |  |
Investment in subsidiaries | 2,436,574 | 2,268,453 |  |
Other investments | 538 | 1,136 |  |
Other assets | 3,012 | 5,081 |  |
TOTAL | 2,449,411 | 2,279,841 |  |
LIABILITIES AND STOCKHOLDERS' EQUITY |  |  |  |
Long-term debt | 137,178 | 160,570 |  |
Other liabilities | 490 | 5,340 |  |
Total liabilities | 137,668 | 165,910 |  |
STOCKHOLDERS' EQUITY |  |  |  |
Common stock, $0.001 par value, 200,000,000 shares authorized; 156,798,011 and 155,743,241 shares issued in 2011 and 2010, respectively; 149,327,907 and 148,542,940 shares outstanding in 2011 and 2010, respectively. | 157 | 156 |  |
Common stock, par value (in dollars per share) | $ 0.001 | $ 0.001 |  |
Common stock, shares authorized | 200,000,000 | 200,000,000 |  |
Common stock, shares issued | 156,798,011 | 155,743,241 |  |
Common stock, shares outstanding | 149,327,907 | 148,542,940 |  |
Additional paid in capital | 1,443,883 | 1,434,277 |  |
Retained earnings | 934,617 | 720,116 |  |
Treasury stock, at cost - 7,470,104 shares in 2011 and 7,200,301 shares in 2010. | (116,001) | (111,262) |  |
Treasury stock, shares | 7,470,104 | 7,200,301 |  |
Accumulated other comprehensive (loss) income, net of tax | (33,940) | (12,414) |  |
Total stockholders' equity | 2,311,743 | 2,113,931 |  |
TOTAL | 2,449,411 | 2,279,841 |  |
East West Bancorp, Inc. | Preferred stock, Series A, non-cumulative convertible |  |  |  |
STOCKHOLDERS' EQUITY |  |  |  |
Preferred stock, $0.001 par value, 5,000,000 shares authorized; Series A, non-cumulative convertible, 200,000 shares issued and 85,710 and 85,741 shares outstanding in 2011 and 2010, respectively. | $ 83,027 | $ 83,058 |  |
Preferred stock, par value (in dollars per share) | $ 0.001 | $ 0.001 |  |
Preferred stock, shares authorized | 5,000,000 | 5,000,000 |  |
Preferred stock, shares issued | 200,000 | 200,000 |  |
Preferred stock, shares outstanding | 85,710 | 85,741 |  |

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- Definition Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7 -Footnote 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3044-108585 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 8, 9 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6676-107765 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 7, 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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- Definition A savings certificate entitling the Entity (that is, bearer) to receive interest at an established maturity date, based upon a fixed interest rate. A certificate of deposit may be issued in any denomination. Certificates of deposit are generally issued by commercial banks and, therefore, insured by the FDIC (up to the prescribed limit). Certificates of deposit generally restrict holders from withdrawing funds on demand without the incurrence of penalties. Generally, only certificates of deposit with original maturities of three months or less qualify as cash equivalents. Original maturity means original maturity to the entity holding the investment. As a related example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 8, 9 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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