XML 59 R48.htm IDEA: XBRL DOCUMENT
v3.8.0.1

LOANS AND ALLOWANCE FOR LOAN LOSSES (Summary of Impaired Loan Balances and Associated Allowance by Portfolio Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment - with an allowance recorded | $ 8,851 | $ 14,803 | $ 8,851 | $ 14,803 | $ 14,858
Unpaid Principal Balance - with an allowance recorded | 8,851 | 14,803 | 8,851 | 14,803 | 14,858
Related Allowance | 1,934 | 1,957 | 1,934 | 1,957 | 2,007
Average Recorded Investment - with an allowance recorded | 9,866 | 12,752 | 13,373 | 7,620 | 9,418
Interest Income Recognized - with an allowance recorded | 52 | 56 | 118 | 81 | 106
Recorded Investment - without allowance recorded | 4,579 | 5,879 | 4,579 | 5,879 | 5,396
Unpaid Principal Balance - without allowance recorded | 6,478 | 9,474 | 6,478 | 9,474 | 7,756
Impaired Financing Receivable With No Related Allowance Related Allowance | 0 | 0 | 0 | 0 |
Average Recorded Investment - without allowance recorded | 4,552 | 5,295 | 4,832 | 7,424 | 6,970
Interest Income Recognized - without allowance recorded | 21 | 36 | 51 | 56 | 76
Impaired Financing Receivable, Recorded Investment | 13,430 | 20,682 | 13,430 | 20,682 | 20,254
Impaired financing receivable, unpaid principal balance | 15,329 | 24,277 | 15,329 | 24,277 | 22,614
Impaired Financing Receivable, Average Recorded Investment | 14,418 | 18,047 | 18,205 | 15,044 | 16,388
Impaired Financing Receivable, Interest Income, Accrual Method | 73 | 92 | 169 | 137 | 182
Residential Real Estate |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment - with an allowance recorded | 3,262 | 3,041 | 3,262 | 3,041 | 3,019
Unpaid Principal Balance - with an allowance recorded | 3,262 | 3,041 | 3,262 | 3,041 | 3,019
Related Allowance | 464 | 511 | 464 | 511 | 483
Average Recorded Investment - with an allowance recorded | 3,194 | 3,050 | 3,084 | 3,108 | 3,088
Interest Income Recognized - with an allowance recorded | 48 | 56 | 103 | 81 | 106
Recorded Investment - without allowance recorded | 1,530 | 1,510 | 1,530 | 1,510 | 1,329
Unpaid Principal Balance - without allowance recorded | 1,949 | 1,996 | 1,949 | 1,996 | 1,800
Impaired Financing Receivable With No Related Allowance Related Allowance | 0 | 0 | 0 | 0 |
Average Recorded Investment - without allowance recorded | 1,427 | 1,731 | 1,349 | 2,275 | 2,057
Interest Income Recognized - without allowance recorded | 15 | 7 | 15 | 7 | 9
Commercial Real Estate |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment - with an allowance recorded | 5,589 | 11,354 | 5,589 | 11,354 | 11,443
Unpaid Principal Balance - with an allowance recorded | 5,589 | 11,354 | 5,589 | 11,354 | 11,443
Related Allowance | 1,470 | 1,284 | 1,470 | 1,284 | 1,373
Average Recorded Investment - with an allowance recorded | 6,590 | 7,582 | 10,048 | 3,092 | 5,165
Interest Income Recognized - with an allowance recorded | 4 |  | 15 |  |
Recorded Investment - without allowance recorded | 784 | 1,932 | 784 | 1,932 | 1,874
Unpaid Principal Balance - without allowance recorded | 1,032 | 2,427 | 1,032 | 2,427 | 2,369
Impaired Financing Receivable With No Related Allowance Related Allowance | 0 | 0 | 0 | 0 |
Average Recorded Investment - without allowance recorded | 794 | 2,015 | 1,250 | 2,322 | 2,214
Interest Income Recognized - without allowance recorded | 15 | 33 | 22 | 37 | 51
Commercial |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment - with an allowance recorded | 0 | 0 | 0 | 0 | 0
Unpaid Principal Balance - with an allowance recorded | 0 | 0 | 0 | 0 | 0
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment - with an allowance recorded | 82 | 1,782 | 41 | 1,016 | 762
Recorded Investment - without allowance recorded | 1,842 | 2,243 | 1,842 | 2,243 | 2,028
Unpaid Principal Balance - without allowance recorded | 3,015 | 4,667 | 3,015 | 4,667 | 3,209
Impaired Financing Receivable With No Related Allowance Related Allowance | 0 | 0 | 0 | 0 |
Average Recorded Investment - without allowance recorded | 1,891 | 1,354 | 1,959 | 2,639 | 2,507
Interest Income Recognized - without allowance recorded | (6) | (11) | 8 | 12 | 16
Home Equity |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment - with an allowance recorded | 0 | 302 | 0 | 302 | 299
Unpaid Principal Balance - with an allowance recorded | 0 | 302 | 0 | 302 | 299
Related Allowance | 0 | 88 | 0 | 88 | 86
Average Recorded Investment - with an allowance recorded |  | 303 | 167 | 307 | 305
Recorded Investment - without allowance recorded | 423 | 187 | 423 | 187 | 158
Unpaid Principal Balance - without allowance recorded | 482 | 374 | 482 | 374 | 368
Impaired Financing Receivable With No Related Allowance Related Allowance | 0 | 0 | 0 | 0 |
Average Recorded Investment - without allowance recorded | 440 | 188 | 271 | 181 | 180
Interest Income Recognized - without allowance recorded | 1 | 3 | 6 |  |
Consumer |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment - with an allowance recorded | 0 | 0 | 0 | 0 | 0
Unpaid Principal Balance - with an allowance recorded | 0 | 0 | 0 | 0 | 0
Related Allowance | 0 | 0 | 0 | 0 | 0
Average Recorded Investment - with an allowance recorded |  |  |  |  | 0
Recorded Investment - without allowance recorded | 0 | 7 | 0 | 7 | 7
Unpaid Principal Balance - without allowance recorded | 0 | 10 | 0 | 10 | 10
Impaired Financing Receivable With No Related Allowance Related Allowance | 0 | 0 | 0 | 0 |
Average Recorded Investment - without allowance recorded |  | 7 | 3 | 7 | 12
Interest Income Recognized - without allowance recorded | (4) | 4 |  |  |
HPFC Portfolio Segment |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Recorded Investment - with an allowance recorded | 0 | 106 | 0 | 106 | 97
Unpaid Principal Balance - with an allowance recorded | 0 | 106 | 0 | 106 | 97
Related Allowance | 0 | 74 | 0 | 74 | 65
Average Recorded Investment - with an allowance recorded |  | 35 | 33 | 97 | 98
Recorded Investment - without allowance recorded | 0 | 0 | 0 | 0 | 0
Unpaid Principal Balance - without allowance recorded | 0 | 0 | 0 | 0 | 0
Impaired Financing Receivable With No Related Allowance Related Allowance | $ 0 | $ 0 | $ 0 | $ 0 |
Average Recorded Investment - without allowance recorded |  |  |  |  | $ 0

X
- Definition Impaired Financing Receivable, With No Related Allowance, Related Allowance + References No definition available. + Details
Name: | cac_ImpairedFinancingReceivableWithNoRelatedAllowanceRelatedAllowance
Namespace Prefix: | cac_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableImpairedLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5258-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953550-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Recorded Investment -URI http://asc.fasb.org/extlink&oid=65880944 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableRelatedAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5258-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of investment in impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953550-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5258-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of interest income, recognized on accrual basis, on financing receivables, for which there is a related allowance for credit losses and are recognized as impaired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of investment in impaired financing receivables for which there is a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953550-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cac_HomeEquityPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cac_HPFCPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |