XML 62 R36.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 5 - Stock-Based Compensation (Details) - Tax Short-Fall From Share-Based Payment Arrangements (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Tax Short-Fall From Share-Based Payment Arrangements [Abstract] |  |  |  |
Short-fall of tax deductions in excess of grant-date fair value | $ (63) | $ (114) | $ (143) | $ (679)
Benefit of tax deductions on grant-date fair value | 95 | 114 | 702 | 777
Total benefit of tax deductions | $ 32 | $ 0 | $ 559 | $ 98

X
- Definition Benefit Of Tax Deductions On Grant Date Fair Value + References No definition available. + Details
Name: | caty_BenefitOfTaxDeductionsOnGrantDateFairValue
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | caty_TaxShortFallFromShareBasedPaymentArrangementsAbstract
Namespace Prefix: | caty_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total Benefit Of Tax Deductions + References No definition available. + Details
Name: | caty_TotalBenefitOfTaxDeductions
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash outflow for realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11374-113907 + Details
Name: | us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration