XML 91 R63.htm IDEA: XBRL DOCUMENT
v3.3.1.900

LOANS AND ALLOWANCE FOR LOAN LOSSES - Receivables Past Due (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | $ 12,232 | $ 7,778
Loans Past Due 90 Days or More and Still Accruing | 18 | 1,454
Past Due | 18,479 | 15,090
Loans Not Past Due | 1,150,929 | 1,106,633
Total ending loans balance | 1,171,503 | 1,124,354
30 - 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 9,793 | 5,270
60 - 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 1,012 | 5,147
90 Days or More Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 7,674 | 4,673
Commercial, and Agricultural |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total ending loans balance | 193,700 | 166,820
Commercial mortgages: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total ending loans balance | 507,700 | 453,719
Residential mortgages |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 3,610 | 3,615
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Past Due | 5,411 | 5,021
Loans Not Past Due | 190,555 | 192,016
Total ending loans balance | 196,236 | 197,287
Residential mortgages | 30 - 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 2,983 | 2,327
Residential mortgages | 60 - 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 725 | 1,161
Residential mortgages | 90 Days or More Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 1,703 | 1,533
Consumer Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total ending loans balance | 273,867 | 306,528
Commercial and industrial | Commercial, and Agricultural |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 13 | 312
Loans Past Due 90 Days or More and Still Accruing | 3 | 0
Past Due | 413 | 845
Loans Not Past Due | 192,248 | 164,332
Total ending loans balance | 192,661 | 165,797
Commercial and industrial | Commercial, and Agricultural | 30 - 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 398 | 551
Commercial and industrial | Commercial, and Agricultural | 60 - 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 3 | 257
Commercial and industrial | Commercial, and Agricultural | 90 Days or More Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 12 | 37
Agricultural | Commercial, and Agricultural |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Past Due | 0 | 0
Loans Not Past Due | 1,039 | 1,023
Total ending loans balance | 1,039 | 1,023
Agricultural | Commercial, and Agricultural | 30 - 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 0
Agricultural | Commercial, and Agricultural | 60 - 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 0
Agricultural | Commercial, and Agricultural | 90 Days or More Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 0
Construction Loans | Commercial mortgages: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 63 | 150
Loans Past Due 90 Days or More and Still Accruing | 0 | 1,446
Past Due | 0 | 1,446
Loans Not Past Due | 41,231 | 53,521
Total ending loans balance | 41,231 | 54,967
Construction Loans | Commercial mortgages: | 30 - 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 0
Construction Loans | Commercial mortgages: | 60 - 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 0
Construction Loans | Commercial mortgages: | 90 Days or More Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 1,446
Commercial mortgages | Commercial mortgages: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 7,203 | 2,831
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Past Due | 9,635 | 4,587
Loans Not Past Due | 455,009 | 392,404
Total ending loans balance | 466,469 |
Commercial mortgages | Commercial mortgages: | 30 - 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 4,197 | 276
Commercial mortgages | Commercial mortgages: | 60 - 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 199 | 3,151
Commercial mortgages | Commercial mortgages: | 90 Days or More Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 5,239 | 1,160
Credit cards |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total ending loans balance | 1,482 | 1,654
Credit cards | Consumer Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Loans Past Due 90 Days or More and Still Accruing | 15 | 8
Past Due | 49 | 13
Loans Not Past Due | 1,433 | 1,641
Total ending loans balance | 1,482 | 1,654
Credit cards | Consumer Loans | 30 - 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 30 | 2
Credit cards | Consumer Loans | 60 - 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 4 | 3
Credit cards | Consumer Loans | 90 Days or More Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 15 | 8
Home Equity Loan | Consumer Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 758 | 515
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Past Due | 549 | 1,019
Loans Not Past Due | 101,428 | 98,572
Total ending loans balance | 101,977 | 99,591
Home Equity Loan | Consumer Loans | 30 - 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 233 | 635
Home Equity Loan | Consumer Loans | 60 - 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 77 | 217
Home Equity Loan | Consumer Loans | 90 Days or More Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 239 | 167
Indirect consumer loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total ending loans balance | 151,726 | 185,217
Indirect consumer loans | Consumer Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 542 | 325
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Past Due | 2,195 | 2,081
Loans Not Past Due | 149,531 | 183,136
Total ending loans balance | 151,726 | 185,217
Indirect consumer loans | Consumer Loans | 30 - 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 1,744 | 1,444
Indirect consumer loans | Consumer Loans | 60 - 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 4 | 345
Indirect consumer loans | Consumer Loans | 90 Days or More Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 447 | 292
Direct Consumer Loans | Consumer Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 43 | 30
Loans Past Due 90 Days or More and Still Accruing | 0 | 0
Past Due | 227 | 78
Loans Not Past Due | 18,455 | 19,988
Total ending loans balance | 18,682 | 20,066
Direct Consumer Loans | Consumer Loans | 30 - 59 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 208 | 35
Direct Consumer Loans | Consumer Loans | 60 - 89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 0 | 13
Direct Consumer Loans | Consumer Loans | 90 Days or More Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Past Due | 19 | 30
Loans acquired with deteriorated credit quality |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 2,095 | 2,631
Total ending loans balance | 2,095 | 2,631
Loans acquired with deteriorated credit quality | Commercial, and Agricultural |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total ending loans balance | 0 | 620
Loans acquired with deteriorated credit quality | Commercial mortgages: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total ending loans balance | 1,825 | 1,761
Loans acquired with deteriorated credit quality | Residential mortgages |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 270 | 250
Total ending loans balance | 270 | 250
Loans acquired with deteriorated credit quality | Consumer Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total ending loans balance | 0 | 0
Loans acquired with deteriorated credit quality | Commercial and industrial | Commercial, and Agricultural |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 620
Total ending loans balance | 0 | 620
Loans acquired with deteriorated credit quality | Agricultural | Commercial, and Agricultural |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Total ending loans balance | 0 | 0
Loans acquired with deteriorated credit quality | Construction Loans | Commercial mortgages: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Total ending loans balance | 0 | 0
Loans acquired with deteriorated credit quality | Commercial mortgages | Commercial mortgages: |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 1,825 | 1,761
Loans acquired with deteriorated credit quality | Credit cards | Consumer Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Total ending loans balance | 0 | 0
Loans acquired with deteriorated credit quality | Home Equity Loan | Consumer Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Loans acquired with deteriorated credit quality | Indirect consumer loans | Consumer Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
Total ending loans balance | 0 | 0
Loans acquired with deteriorated credit quality | Direct Consumer Loans | Consumer Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Non-accrual | 0 | 0
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 -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5111-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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=49124121&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 -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=49124121&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 -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=49124121&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_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_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=chmg_CommercialAndIndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=chmg_AgriculturalMember
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_CommercialMortgagesOtherMember
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_ReceivablesAcquiredWithDeterioratedCreditQualityAxis=us-gaap_ReceivablesAcquiredWithDeterioratedCreditQualityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |