XML 54 R40.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Note 8 - Deposits (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Notes Tables |
Summary of Deposits [Table Text Block] |
|  | As of December 31, |
|  | 2018 |  |  | 2017 |
|  | (In thousands) |
Demand |  | $ | 2,857,443 |  |  | $ | 2,783,127 |
NOW accounts |  |  | 1,365,763 |  |  |  | 1,410,519 |
Money market accounts |  |  | 2,027,404 |  |  |  | 2,248,271 |
Saving accounts |  |  | 738,656 |  |  |  | 857,199 |
Time deposits |  |  | 6,713,074 |  |  |  | 5,390,777 |
Total |  | $ | 13,702,340 |  |  | $ | 12,689,893 |
Schedule of Maturities for Time Deposits [Table Text Block] |
|  | Expected Maturity Date at December 31, |  |  |  |  |
|  | 2019 |  |  | 2020 |  |  | 2021 |  |  | 2022 |  |  | 2023 |  |  | Thereafter |  |  | Total |
|  | (In thousands) |
Time deposits |  | $ | 5,639,064 |  |  | $ | 538,309 |  |  | $ | 497,601 |  |  | $ | 719 |  |  | $ | 37,370 |  |  | $ | 11 |  |  | $ | 6,713,074 |
Summary of Interest Expense on Deposits [Table Text Block] |
|  | Year Ended December 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
|  | (In thousands) |
Interest bearing demand |  | $ | 2,718 |  |  | $ | 2,242 |  |  | $ | 1,740 |
Money market accounts |  |  | 16,202 |  |  |  | 15,062 |  |  |  | 13,308 |
Saving accounts |  |  | 1,583 |  |  |  | 1,772 |  |  |  | 1,046 |
Time deposits |  |  | 86,368 |  |  |  | 46,768 |  |  |  | 43,327 |
Total |  | $ | 106,871 |  |  | $ | 65,844 |  |  | $ | 59,421 |

X
- Definition The schedule of maturities for time deposits. + References No definition available. + Details
Name: | caty_ScheduleOfMaturitiesForTimeDepositsTableTextBlock
Namespace Prefix: | caty_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summary disclosure of deposits. + References No definition available. + Details
Name: | caty_SummaryOfDepositsTableTextBlock
Namespace Prefix: | caty_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of interest expense on deposits. + References No definition available. + Details
Name: | caty_SummaryOfInterestExpenseOnDepositsTableTextBlock
Namespace Prefix: | caty_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration