XML 72 R54.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Note 2 - Acquisition (Details Textual) - SinoPac Bancorp [Member] - USD ($) | Dec. 12, 2017 | Nov. 14, 2017 | Nov. 04, 2017 | Jul. 14, 2017 | Dec. 31, 2017
--- | --- | --- | --- | --- | ---
Business Combination, Aggregate Purchase Price |  |  |  | $ 351,600,000 |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares |  |  |  | 926,192 |
Payments to Acquire Businesses, Gross |  | $ 100,000,000 | $ 100,000,000 | $ 285,324,000 |
Business Combination, Deferred Payments |  |  |  |  | $ 35,400,000
Business Combination, Addition Cash Consideration Related to Realized Gain from Sale of Building | $ 4,100,000 |  |  |  |

X
- Definition The addition cash consideration was paid based on the realized gain from the sale of the building. + References No definition available. + Details
Name: | caty_BusinessCombinationAdditionCashConsiderationRelatedToRealizedGainFromSaleOfBuilding
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the amount of aggregate purchase price in a business combination. + References No definition available. + Details
Name: | caty_BusinessCombinationAggregatePurchasePrice
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of liabilities payable to a counter party pertain to a business combination. + References No definition available. + Details
Name: | caty_BusinessCombinationDeferredPayments
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=caty_SinoPacBancorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |