XML 45 R33.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 1 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2013
Accounting Policies [Abstract] |
Schedule Of Estimated Useful Lives Of Assets [Table Text Block] |
Type |  | Estimated Useful Life |
Buildings (years) |  | 15 | to | 45 |
Building improvements (years) |  | 5 | to | 20 |
Furniture, fixtures, and equipment (years) |  | 3 | to | 25 |
Leasehold improvements |  | Shorter of useful lives or the terms of the leases |

X
- Definition Schedule Of Estimated Useful Lives Of Assets. + References No definition available. + Details
Name: | caty_ScheduleOfEstimatedUsefulLivesOfAssetsTableTextBlock
Namespace Prefix: | caty_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration