XML 23 R97.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Note 12 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Commitments To Extend Notional Amount | $ 3,077,081 | $ 2,691,579
Commitments to Fund Fixed Rate Loans | 182,800 |
Commitments to Fund Adjustable Rate Loans | $ 2,900,000 |

X
- Definition Commitments To Extend Notional Amount + References No definition available. + Details
Name: | caty_CommitmentsToExtendNotionalAmount
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Commitments to fund adjustable rate loans. + References No definition available. + Details
Name: | caty_CommitmentsToFundAdjustableRateLoans
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Commitments to fund fixed rate loans. + References No definition available. + Details
Name: | caty_CommitmentsToFundFixedRateLoans
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant