    <SEC-DOCUMENT>0001564590-21-051751-index.html : 20211025
    <SEC-HEADER>0001564590-21-051751.hdr.sgml : 20211025
    <ACCEPTANCE-DATETIME>20211025170314
    ACCESSION NUMBER:		0001564590-21-051751
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		32
    CONFORMED PERIOD OF REPORT:	20211025
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20211025
    DATE AS OF CHANGE:		20211025

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			CATHAY GENERAL BANCORP
    		CENTRAL INDEX KEY:			0000861842
    		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
    		IRS NUMBER:				954274680
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-31830
    		FILM NUMBER:		211344868

    	BUSINESS ADDRESS:
    		STREET 1:		777 N BROADWAY
    		CITY:			LOS ANGELES
    		STATE:			CA
    		ZIP:			90012
    		BUSINESS PHONE:		2136254700

    	MAIL ADDRESS:
    		STREET 1:		777 NORTH BROADWAY
    		CITY:			LOS ANGELES
    		STATE:			CA
    		ZIP:			90012

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	CATHAY BANCORP INC
    		DATE OF NAME CHANGE:	19930328
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>caty-8k_20211025.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: caty-8k_20211025.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>d210581dex991.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: d210581dex991.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>3
    <FILENAME>caty-ex992_24.htm
    <DESCRIPTION>EX-99.2
    <TEXT>
    Document 3 - file: caty-ex992_24.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>g210581glogo.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: g210581glogo.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>slide-3ik05g3teoi.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: slide-3ik05g3teoi.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>slide-v2qvzbwiuss.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: slide-v2qvzbwiuss.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>slide-srypdnjde3p.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: slide-srypdnjde3p.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>slide-jj2likudxx0.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: slide-jj2likudxx0.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>slide-qlkbinub1eg.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: slide-qlkbinub1eg.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>slide-4emvydia43e.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: slide-4emvydia43e.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>slide-vndkkiimim3.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: slide-vndkkiimim3.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>slide-zrp2uk5pxkm.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: slide-zrp2uk5pxkm.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>slide-toznif2vip1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: slide-toznif2vip1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>slide-1h5rauns0kt.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: slide-1h5rauns0kt.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>slide-toedfqj5z0g.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: slide-toedfqj5z0g.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>slide-gdwdpw42xef.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: slide-gdwdpw42xef.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>slide-241ubqe0vax.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: slide-241ubqe0vax.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>slide-hghnipp3l11.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: slide-hghnipp3l11.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>slide-c4rmt4eeh1g.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: slide-c4rmt4eeh1g.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>slide-jiitpzv15gt.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 20 - file: slide-jiitpzv15gt.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>slide-ooeqyu4iita.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 21 - file: slide-ooeqyu4iita.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>22
    <FILENAME>caty-20211025.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
    <TEXT>
    Document 22 - file: caty-20211025.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>23
    <FILENAME>caty-20211025_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
    <TEXT>
    Document 23 - file: caty-20211025_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>24
    <FILENAME>caty-20211025_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
    <TEXT>
    Document 24 - file: caty-20211025_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>25
    <FILENAME>caty-8k_20211025_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 25 - file: caty-8k_20211025_htm.html

    Document 25 - RAW XML: caty-8k_20211025_htm.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>26
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 26 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>27
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 27 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>28
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 28 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>29
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 29 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>30
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 30 - file: FilingSummary.html

    Document 30 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>32
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 32 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>33
    <FILENAME>0001564590-21-051751-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 33 - file: 0001564590-21-051751-xbrl.zip

    </DOCUMENT>
    </SEC-DOCUMENT>