XML 89 R75.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Note 6 - Investments in Affordable Housing and Alternative Energy Partnerships (Details Textual) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Affordable Housing Investments | $ 236.8 | $ 172.7 |
Number Of Limited Partnerships In Housing Investments | 7 |  |
Increase in Total Assets and Liabilities from Consolidating Affordable Housing Equity Interest | $ 23.7 | 24.3 |
Other Borrowings from Consolidating Affordable Housing Equity Interest | 17.7 | 18.6 |
Other Liabilities from Affordablehousing Unfunded Commitments | 115.0 | 85.8 |
Affordable Housing Investments, Scheduled Funding for Unfunded Commitments in Next 12 months | 52.7 |  |
Affordable Housing Investments, Scheduled Funding for Unfunded Commitments in Year Two | 33.4 |  |
Affordable Housing Investments, Scheduled Funding for Unfunded Commitments in Year Three | 22.7 |  |
Affordable Housing Investments, Scheduled Funding for Unfunded Commitments in Year Four | 2.6 |  |
Affordable Housing Investments, Scheduled Funding for Unfunded Commitments in Year Five | 0.6 |  |
Affordable Housing Investments, Scheduled Funding for Unfunded Commitments Thereafter | 3.0 |  |
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount | 13.4 | 10.1 | $ 10.2
Alternative Energy Tax Credit Partnership Investments, Net | 14.3 | 10.5 |
Energy Tax Credits Used, Amount | 24.5 | $ 20.9 |
Affordable Housing Limited Partnerships [Member] | Domestic Tax Authority [Member] |  |  |
Remaining and Future Available Tax Credit | 160.2 |  |
Affordable Housing Limited Partnerships [Member] | State and Local Jurisdiction [Member] |  |  |
Remaining and Future Available Tax Credit | $ 3.3 |  |

X
- Definition Affordable Housing Investments + References No definition available. + Details
Name: | caty_AffordableHousingInvestments
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of scheduled funding for unfunded commitments in the next 12 months for affordable housing investments. + References No definition available. + Details
Name: | caty_AffordableHousingInvestmentsScheduledFundingForUnfundedCommitmentsInNext12Months
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of scheduled funding for unfunded commitments in the fifth fiscal year following the latest fiscal year for affordable housing investments. + References No definition available. + Details
Name: | caty_AffordableHousingInvestmentsScheduledFundingForUnfundedCommitmentsInYearFive
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of scheduled funding for unfunded commitments in the fourth fiscal year following the latest fiscal year for affordable housing investments. + References No definition available. + Details
Name: | caty_AffordableHousingInvestmentsScheduledFundingForUnfundedCommitmentsInYearFour
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of scheduled funding for unfunded commitments in the third fiscal year following the latest fiscal year for affordable housing investments. + References No definition available. + Details
Name: | caty_AffordableHousingInvestmentsScheduledFundingForUnfundedCommitmentsInYearThree
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of scheduled funding for unfunded commitments in the second fiscal year following the latest fiscal year for affordable housing investments. + References No definition available. + Details
Name: | caty_AffordableHousingInvestmentsScheduledFundingForUnfundedCommitmentsInYearTwo
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of scheduled funding for unfunded commitments after the fifth fiscal year following the latest fiscal year for affordable housing investments. + References No definition available. + Details
Name: | caty_AffordableHousingInvestmentsScheduledFundingForUnfundedCommitmentsThereafter
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the net investments in the alternative energy tax credit partnership. + References No definition available. + Details
Name: | caty_AlternativeEnergyTaxCreditPartnershipInvestmentsNet
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of energy tax credits used during the period. + References No definition available. + Details
Name: | caty_EnergyTaxCreditsUsedAmount
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase in total assets and liabilities from consolidating affordable housing equity interest. + References No definition available. + Details
Name: | caty_IncreaseInTotalAssetsAndLiabilitiesFromConsolidatingAffordableHousingEquityInterest
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of limited Partnerships in housing investments. + References No definition available. + Details
Name: | caty_NumberOfLimitedPartnershipsInHousingInvestments
Namespace Prefix: | caty_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Other borrowings from consolidating affordable housing equity interest. + References No definition available. + Details
Name: | caty_OtherBorrowingsFromConsolidatingAffordableHousingEquityInterest
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Other liabilities from affordable housing unfunded commitments. + References No definition available. + Details
Name: | caty_OtherLiabilitiesFromAffordablehousingUnfundedCommitments
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Tax credit remaining and available for future use. + References No definition available. + Details
Name: | caty_RemainingAndFutureAvailableTaxCredit
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to investment tax credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 + Details
Name: | us-gaap_IncomeTaxReconciliationTaxCreditsInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | invest_InvestmentAxis=caty_AffordableHousingLimitedPartnershipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_DomesticCountryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_StateAndLocalJurisdictionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |