XML 107 R89.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Note 10 - Capital Resources - Outstanding Junior Subordinated Notes (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | May 31, 2014
Junior subordinated debt | $ 119,136,000 | $ 119,100,000
Cathay Capital Trust I [Member] |  |
Issuance date | Jun. 26, 2003 |
Junior subordinated debt | $ 20,619,000 |
Not redeemable until | Jun. 30, 2008 |
Stated maturity | Jun. 30, 2033 |
Annualized coupon rate | 3-month LIBOR + 3.15% |
Current interest rate | 4.84% |
Date of rate change | Dec. 30, 2017 |
Payable/distribution date | March 30, June 30, September 30, December 30 |
Cathay Statutory Trust I [Member] |  |
Issuance date | Sep. 17, 2003 |
Junior subordinated debt | $ 20,619,000 |
Not redeemable until | Sep. 17, 2008 |
Stated maturity | Sep. 17, 2033 |
Annualized coupon rate | 3-month LIBOR + 3.00% |
Current interest rate | 4.60% |
Date of rate change | Dec. 18, 2017 |
Payable/distribution date | March 17, June 17, September 17, December 17 |
Cathay Capital Trust II [Member] |  |
Issuance date | Dec. 30, 2003 |
Junior subordinated debt | $ 12,887,000 |
Not redeemable until | Mar. 30, 2009 |
Stated maturity | Mar. 30, 2034 |
Annualized coupon rate | 3-month LIBOR + 2.90% |
Current interest rate | 4.59% |
Date of rate change | Dec. 30, 2017 |
Payable/distribution date | March 30, June 30, September 30, December 30 |
Cathay Capital Trust III [Member] |  |
Issuance date | Mar. 28, 2007 |
Junior subordinated debt | $ 46,392,000 |
Not redeemable until | Jun. 15, 2012 |
Stated maturity | Jun. 15, 2037 |
Annualized coupon rate | 3-month LIBOR + 1.48% |
Current interest rate | 3.07% |
Date of rate change | Dec. 15, 2017 |
Payable/distribution date | March 15, June 15, September 15, December 15 |
Cathay Capital Trust IV [Member] |  |
Issuance date | May 31, 2007 |
Junior subordinated debt | $ 18,619,000 |
Not redeemable until | Sep. 06, 2012 |
Stated maturity | Sep. 06, 2037 |
Annualized coupon rate | 3-month LIBOR + 1.4% |
Current interest rate | 2.91% |
Date of rate change | Dec. 06, 2017 |
Payable/distribution date | March 6, June 6, September 6, December 6 |

X
- Definition Represents junior subordinated notes, date of rate change. + References No definition available. + Details
Name: | caty_JuniorSubordinatedNotesDateOfRateChange
Namespace Prefix: | caty_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Junior subordinated notes non redeemable date. + References No definition available. + Details
Name: | caty_JuniorSubordinatedNotesNonRedeemableDate
Namespace Prefix: | caty_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Junior subordinated notes payable, distribution date. + References No definition available. + Details
Name: | caty_JuniorSubordinatedNotesPayableDistributionDate
Namespace Prefix: | caty_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The average effective interest rate during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateDuringPeriod
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date the debt instrument was issued, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentIssuanceDate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentMaturityDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Junior Subordinated Notes, which have a lower priority than senior instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_JuniorSubordinatedNotes
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentAxis=caty_CathayCapitalTrustIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=caty_CathayStatutoryTrustIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=caty_CathayCapitalTrustIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=caty_CathayCapitalTrustIIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=caty_CathayCapitalTrustIVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |