XML 113 R99.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Note 15 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Securities available-for-sale | $ 1,314,345 | $ 1,586,352 | [1]
Assets, fair value disclosure | 1,316,664 | 1,589,753 |
Liabilities, fair value disclosure | 6,997 | 10,648 |
Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available-for-sale | 513,376 | 302,032 | [1]
Assets, fair value disclosure | 513,376 | 302,032 |
Liabilities, fair value disclosure |  |  |
Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available-for-sale | 800,969 | 1,284,320 | [1]
Assets, fair value disclosure | 803,209 | 1,287,659 |
Liabilities, fair value disclosure | 6,997 | 10,648 |
Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available-for-sale |  |  | [1]
Assets, fair value disclosure | 79 | 62 |
Liabilities, fair value disclosure |  |  |
US Treasury Securities [Member] |  |  |
Securities available-for-sale | 489,017 | 284,288 |
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available-for-sale | 489,017 | 284,288 |
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available-for-sale |  |  |
US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available-for-sale |  |  |
US Government-sponsored Enterprises Debt Securities [Member] |  |  |
Securities available-for-sale | 390,331 | 148,160 |
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available-for-sale |  |  |
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available-for-sale | 390,331 | 148,160 |
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available-for-sale |  |  |
Commercial Mortgage Backed Securities [Member] |  |  |
Securities available-for-sale | 336,260 | 1,062,269 |
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available-for-sale |  |  |
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available-for-sale | 336,260 | 1,062,269 |
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available-for-sale |  |  |
Collateralized Mortgage Obligations [Member] |  |  |
Securities available-for-sale | 28 | 36 |
Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available-for-sale |  |  |
Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available-for-sale | 28 | 36 |
Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available-for-sale |  |  |
Corporate Debt Securities [Member] |  |  |
Securities available-for-sale | 74,350 | 73,855 |
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available-for-sale |  |  |
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available-for-sale | 74,350 | 73,855 |
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available-for-sale |  |  |
Mutual Funds [Member] |  |  |
Securities available-for-sale | 6,230 | 5,833 |
Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available-for-sale | 6,230 | 5,833 |
Mutual Funds [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available-for-sale |  |  |
Mutual Funds [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available-for-sale |  |  |
Preferred Stock of Government Sponsored Entities [Member] |  |  |
Securities available-for-sale | 7,308 | 3,216 | [2]
Preferred Stock of Government Sponsored Entities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available-for-sale | 7,308 | 3,216 | [2]
Preferred Stock of Government Sponsored Entities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available-for-sale |  |  | [2]
Preferred Stock of Government Sponsored Entities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available-for-sale |  |  | [2]
Other Equity Securities [Member] |  |  |
Securities available-for-sale | 10,821 | 8,695 | [2]
Other Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available-for-sale | 10,821 | 8,695 | [2]
Other Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available-for-sale |  |  | [2]
Other Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available-for-sale |  |  |
Warrant [Member] |  |  |
Assets, fair value disclosure | 79 | 62 |
Warrant [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, fair value disclosure |  |  |
Warrant [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, fair value disclosure |  |  |
Warrant [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, fair value disclosure | 79 | 62 |
Interest Rate Swap [Member] |  |  |
Assets, fair value disclosure | 938 |  |
Liabilities, fair value disclosure | 3,744 | 6,496 |
Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, fair value disclosure |  |  |
Liabilities, fair value disclosure |  |  |
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, fair value disclosure | 938 |  |
Liabilities, fair value disclosure | 3,744 | 6,496 |
Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, fair value disclosure |  |  |
Liabilities, fair value disclosure |  |  |
Foreign Exchange Contract [Member] |  |  |
Assets, fair value disclosure | 1,302 | 3,339 |
Liabilities, fair value disclosure | 3,132 | 4,124 |
Foreign Exchange Contract [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Assets, fair value disclosure |  |  |
Liabilities, fair value disclosure |  |  |
Foreign Exchange Contract [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Assets, fair value disclosure | 1,302 | 3,339 |
Liabilities, fair value disclosure | 3,132 | 4,124 |
Foreign Exchange Contract [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Assets, fair value disclosure |  |  |
Liabilities, fair value disclosure |  |  |
Option Contracts [Member] |  |  |
Liabilities, fair value disclosure | 121 | 28 |
Option Contracts [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Liabilities, fair value disclosure |  |  |
Option Contracts [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Liabilities, fair value disclosure | 121 | 28 |
Option Contracts [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Liabilities, fair value disclosure |  |  |
[1] | Preferred stock of government sponsored entities and other equity securities as of December 31, 2015 were reclassified as level 1 rather than level 2 as originally classified due to the availability of quoted prices in active markets.
[2] | Preferred stock of government sponsored entities and other equity securities as of December 31, 2015 were reclassified as level 1 rather than level 2 as originally classified due to the availability of quoted prices in active markets.

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562 + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
Name: | us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CollateralizedMortgageObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=caty_MutualFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=caty_PreferredStockOfGovernmentSponsoredEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=caty_OtherEquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_WarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=caty_OptionContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |