XML 53 R41.htm IDEA: XBRL DOCUMENT
v3.5.0.2

LOANS AND ALLOWANCE FOR LOAN LOSSES - Receivables Past Due (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | $ 12,903 | $ 12,232
Loans Past Due 90 Days or More and Still Accruing | 12 | 18
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 18,621 | 18,479
Loans Not Past Due | 1,199,019 | 1,150,929
Total ending loans balance | 1,219,478 | 1,171,503
30 to 59 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 4,601 | 9,793
60 to 89 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 7,076 | 1,012
90 Days or More Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 6,944 | 7,674
Loans Acquired with Deteriorated Credit Quality [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 1,838 | 2,095
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 1,838 | 2,095
Commercial and Agricultural [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 184,348 | 193,700
Commercial and Agricultural [Member] | Loans Acquired with Deteriorated Credit Quality [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 0 | 0
Commercial Mortgages [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 577,118 | 507,700
Commercial Mortgages [Member] | Loans Acquired with Deteriorated Credit Quality [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 1,743 | 1,825
Commercial Mortgages [Member] | Construction [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 20 | 63
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Loans Not Past Due | 35,134 | 41,231
Total ending loans balance | 35,134 | 41,231
Commercial Mortgages [Member] | Construction [Member] | 30 to 59 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Commercial Mortgages [Member] | Construction [Member] | 60 to 89 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Commercial Mortgages [Member] | Construction [Member] | 90 Days or More Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Commercial Mortgages [Member] | Construction [Member] | Loans Acquired with Deteriorated Credit Quality [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 0 | 0
Commercial Mortgages [Member] | Commercial Mortgages Other [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 6,577 | 7,203
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 9,677 | 9,635
Loans Not Past Due | 530,564 | 455,009
Total ending loans balance | 541,984 | 466,469
Commercial Mortgages [Member] | Commercial Mortgages Other [Member] | 30 to 59 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 848 | 4,197
Commercial Mortgages [Member] | Commercial Mortgages Other [Member] | 60 to 89 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 5,513 | 199
Commercial Mortgages [Member] | Commercial Mortgages Other [Member] | 90 Days or More Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 3,316 | 5,239
Commercial Mortgages [Member] | Commercial Mortgages Other [Member] | Loans Acquired with Deteriorated Credit Quality [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 1,743 | 1,825
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 1,743 | 1,825
Residential Mortgages [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 4,225 | 3,610
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 4,785 | 5,411
Loans Not Past Due | 193,262 | 190,555
Total ending loans balance | 198,142 | 196,236
Residential Mortgages [Member] | 30 to 59 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,697 | 2,983
Residential Mortgages [Member] | 60 to 89 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 928 | 725
Residential Mortgages [Member] | 90 Days or More Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 2,160 | 1,703
Residential Mortgages [Member] | Loans Acquired with Deteriorated Credit Quality [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 95 | 270
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 95 | 270
Consumer Loans [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 259,870 | 273,867
Consumer Loans [Member] | Loans Acquired with Deteriorated Credit Quality [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 0 | 0
Consumer Loans [Member] | Credit Cards [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Loans Past Due 90 Days or More and Still Accruing | 11 | 15
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 28 | 49
Loans Not Past Due | 1,324 | 1,433
Total ending loans balance | 1,352 | 1,482
Consumer Loans [Member] | Credit Cards [Member] | 30 to 59 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 11 | 30
Consumer Loans [Member] | Credit Cards [Member] | 60 to 89 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 6 | 4
Consumer Loans [Member] | Credit Cards [Member] | 90 Days or More Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 11 | 15
Consumer Loans [Member] | Credit Cards [Member] | Loans Acquired with Deteriorated Credit Quality [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 0 | 0
Consumer Loans [Member] | Home Equity Lines and Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 1,653 | 758
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,636 | 549
Loans Not Past Due | 96,993 | 101,428
Total ending loans balance | 98,629 | 101,977
Consumer Loans [Member] | Home Equity Lines and Loans [Member] | 30 to 59 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 272 | 233
Consumer Loans [Member] | Home Equity Lines and Loans [Member] | 60 to 89 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 190 | 77
Consumer Loans [Member] | Home Equity Lines and Loans [Member] | 90 Days or More Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,174 | 239
Consumer Loans [Member] | Home Equity Lines and Loans [Member] | Loans Acquired with Deteriorated Credit Quality [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 0 | 0
Consumer Loans [Member] | Indirect Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 298 | 542
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 2,251 | 2,195
Loans Not Past Due | 139,566 | 149,531
Total ending loans balance | 141,817 | 151,726
Consumer Loans [Member] | Indirect Consumer Loans [Member] | 30 to 59 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1,651 | 1,744
Consumer Loans [Member] | Indirect Consumer Loans [Member] | 60 to 89 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 416 | 4
Consumer Loans [Member] | Indirect Consumer Loans [Member] | 90 Days or More Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 184 | 447
Consumer Loans [Member] | Indirect Consumer Loans [Member] | Loans Acquired with Deteriorated Credit Quality [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 0 | 0
Consumer Loans [Member] | Direct Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 120 | 43
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 210 | 227
Loans Not Past Due | 17,862 | 18,455
Total ending loans balance | 18,072 | 18,682
Consumer Loans [Member] | Direct Consumer Loans [Member] | 30 to 59 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 90 | 208
Consumer Loans [Member] | Direct Consumer Loans [Member] | 60 to 89 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 22 | 0
Consumer Loans [Member] | Direct Consumer Loans [Member] | 90 Days or More Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 98 | 19
Consumer Loans [Member] | Direct Consumer Loans [Member] | Loans Acquired with Deteriorated Credit Quality [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 0 | 0
Commercial and Industrial Sector [Member] | Commercial and Agricultural [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 10 | 13
Loans Past Due 90 Days or More and Still Accruing | 1 | 3
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 34 | 413
Loans Not Past Due | 183,907 | 192,248
Total ending loans balance | 183,941 | 192,661
Commercial and Industrial Sector [Member] | Commercial and Agricultural [Member] | 30 to 59 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 32 | 398
Commercial and Industrial Sector [Member] | Commercial and Agricultural [Member] | 60 to 89 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1 | 3
Commercial and Industrial Sector [Member] | Commercial and Agricultural [Member] | 90 Days or More Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 1 | 12
Commercial and Industrial Sector [Member] | Commercial and Agricultural [Member] | Loans Acquired with Deteriorated Credit Quality [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | 0 | 0
Agricultural Sector [Member] | Commercial and Agricultural [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Loans Not Past Due | 407 | 1,039
Total ending loans balance | 407 | 1,039
Agricultural Sector [Member] | Commercial and Agricultural [Member] | 30 to 59 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Agricultural Sector [Member] | Commercial and Agricultural [Member] | 60 to 89 Days Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Agricultural Sector [Member] | Commercial and Agricultural [Member] | 90 Days or More Past Due [Member] |  |
Aging of the recorded investment in loans past due [Abstract] |  |
Past Due | 0 | 0
Agricultural Sector [Member] | Commercial and Agricultural [Member] | Loans Acquired with Deteriorated Credit Quality [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Aging of the recorded investment in loans past due [Abstract] |  |
Total ending loans balance | $ 0 | $ 0

X
- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + 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 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financing receivables that are current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + 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 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Recorded Investment in financing receivables that are past due at the balance sheet date. + 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 7A -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services. + 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 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_NotesReceivableNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityAxis=us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=chmg_CommercialAndAgriculturalPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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

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

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

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

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_CommercialAndIndustrialSectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquitySecuritiesByIndustryAxis=us-gaap_AgriculturalSectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |