XML 43 R40.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 6 - Investment Securities (Details) - Temporarily Impaired Securities (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2014
Securities Available-for-Sale |  |
Securities Available-for-Sale - Less than 12 Months - Fair Value | $ 877,208 | $ 267,395
Securities Available-for-Sale - Less than 12 Months - Unrealized Losses | 64,562 | 180
Securities Available-for-Sale - 12 Months or longer - Fair Value | 106,378 | 621,362
Securities Available-for-Sale - 12 Months or longer - Unrealized Losses | 5,246 | 22,494
Securities Available-for-Sale - Fair Value | 983,586 | 888,757
Securities Available-for-Sale - Unrealized Losses | 69,808 | 22,674
Total investment securities | 877,208 |
Total investment securities | 64,562 |
Total investment securities | 106,378 |
Total investment securities | 5,246 |
Total investment securities | 983,586 |
Total investment securities | 69,808 |
US Treasury Securities [Member] |  |
Securities Available-for-Sale |  |
Securities Available-for-Sale - Less than 12 Months - Fair Value | 75,064 | 174,959
Securities Available-for-Sale - Less than 12 Months - Unrealized Losses | 1 | 29
Securities Available-for-Sale - Fair Value | 75,064 | 174,959
Securities Available-for-Sale - Unrealized Losses | 1 | 29
Collateralized Mortgage Backed Securities [Member] |  |
Securities Available-for-Sale |  |
Securities Available-for-Sale - Less than 12 Months - Fair Value | 792,012 | 92,436
Securities Available-for-Sale - Less than 12 Months - Unrealized Losses | 64,526 | 151
Securities Available-for-Sale - 12 Months or longer - Fair Value | 272 | 551,854
Securities Available-for-Sale - 12 Months or longer - Unrealized Losses | 2 | 20,922
Securities Available-for-Sale - Fair Value | 792,284 | 644,290
Securities Available-for-Sale - Unrealized Losses | 64,528 | 21,073
Collateralized Mortgage Obligations [Member] |  |
Securities Available-for-Sale |  |
Securities Available-for-Sale - Less than 12 Months - Fair Value | 68 |
Securities Available-for-Sale - Less than 12 Months - Unrealized Losses | 4 |
Securities Available-for-Sale - 12 Months or longer - Fair Value | 301 | 46
Securities Available-for-Sale - 12 Months or longer - Unrealized Losses | 50 | 34
Securities Available-for-Sale - Fair Value | 369 | 46
Securities Available-for-Sale - Unrealized Losses | 54 | 34
Corporate Debt Securities [Member] |  |
Securities Available-for-Sale |  |
Securities Available-for-Sale - Less than 12 Months - Fair Value | 9,970 |
Securities Available-for-Sale - Less than 12 Months - Unrealized Losses | 30 |
Securities Available-for-Sale - 12 Months or longer - Fair Value | 100,081 | 63,645
Securities Available-for-Sale - 12 Months or longer - Unrealized Losses | 4,919 | 1,355
Securities Available-for-Sale - Fair Value | 110,051 | 63,645
Securities Available-for-Sale - Unrealized Losses | 4,949 | 1,355
Mutual Funds [Member] |  |
Securities Available-for-Sale |  |
Securities Available-for-Sale - 12 Months or longer - Fair Value | 5,724 | 5,817
Securities Available-for-Sale - 12 Months or longer - Unrealized Losses | 275 | 183
Securities Available-for-Sale - Fair Value | 5,724 | 5,817
Securities Available-for-Sale - Unrealized Losses | 275 | 183
Mortgage Backed Securities Non Agency [Member] |  |
Securities Available-for-Sale |  |
Securities Available-for-Sale - Less than 12 Months - Fair Value | 94 |
Securities Available-for-Sale - Less than 12 Months - Unrealized Losses | 1 |
Securities Available-for-Sale - Fair Value | 94 |
Securities Available-for-Sale - Unrealized Losses | $ 1 |

X
- Definition Investment Securities With Unrealized Losses Fair Value. + References No definition available. + Details
Name: | caty_InvestmentSecuritiesWithUnrealizedLossesFairValue
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | caty_SecuritiesAvailableForSaleAbstract00
Namespace Prefix: | caty_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total investment securities fair value less than twelve months. + References No definition available. + Details
Name: | caty_TotalInvestmentSecuritiesFairValueLessThanTwelveMonths
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Total investment securities fair value twelve months or longer. + References No definition available. + Details
Name: | caty_TotalInvestmentSecuritiesFairValueTwelveMonthsOrLonger
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Total investment securities unrealized losses. + References No definition available. + Details
Name: | caty_TotalInvestmentSecuritiesUnrealizedLosses
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Total investment securities unrealized losses less than twelve months. + References No definition available. + Details
Name: | caty_TotalInvestmentSecuritiesUnrealizedLossesLessThanTwelveMonths
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Total investment securities unrealized losses twelve months or longer. + References No definition available. + Details
Name: | caty_TotalInvestmentSecuritiesUnrealizedLossesTwelveMonthsOrLonger
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant