XML 82 R68.htm IDEA: XBRL DOCUMENT
v3.23.1

Note 3 - Loans and Allowance for Loan Losses - Allowance for Loan Losses and Balance in the Loan Portfolio (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Beginning balance | $ 7,688 | $ 7,593 | $ 4,057
Charge-offs | (673) | (676) | (754)
Recoveries | 354 | 355 | 290
Provision | 250 | 416 | 4,000
Ending balance | 7,619 | 7,688 | 7,593
Individually evaluated for impairment | 153 | 503 | 431
Collectively evaluated for impairment | 7,466 | 7,185 | 7,162
Individually evaluated for impairment | 2,846 | 5,433 | 7,851
Collectively evaluated for impairment | 1,172,662 | 994,248 | 1,039,745
Acquired with deteriorated credit quality | 14,274 | 17,167 | 22,072
Loans | 1,189,782 | 1,016,848 | 1,069,668
Agricultural [Member] |  |  |
Beginning balance | 448 | 257 | 471
Charge-offs | 0 | 0 | (15)
Recoveries | 0 | 0 | 0
Provision | (304) | 191 | (199)
Ending balance | 144 | 448 | 257
Individually evaluated for impairment | 2 | 251 | 0
Collectively evaluated for impairment | 142 | 197 | 257
Individually evaluated for impairment | 23 | 2,616 | 348
Collectively evaluated for impairment | 64,136 | 62,203 | 53,387
Acquired with deteriorated credit quality | 0 | 0 | 0
Loans | 64,159 | 64,819 | 53,735
Commercial and Industrial [Member] |  |  |
Beginning balance | 1,454 | 1,327 | 655
Charge-offs | (177) | (195) | (148)
Recoveries | 143 | 86 | 57
Provision | (59) | 236 | 763
Ending balance | 1,361 | 1,454 | 1,327
Individually evaluated for impairment | 14 | 95 | 19
Collectively evaluated for impairment | 1,347 | 1,359 | 1,308
Individually evaluated for impairment | 177 | 339 | 1,663
Collectively evaluated for impairment | 206,074 | 197,656 | 295,154
Acquired with deteriorated credit quality | 3,959 | 5,029 | 6,710
Loans | 210,210 | 203,024 | 303,527
Consumer Portfolio Segment [Member] |  |  |
Beginning balance | 290 | 317 | 270
Charge-offs | (496) | (370) | (329)
Recoveries | 206 | 214 | 204
Provision | 310 | 129 | 172
Ending balance | 310 | 290 | 317
Individually evaluated for impairment | 1 | 2 | 1
Collectively evaluated for impairment | 309 | 288 | 316
Individually evaluated for impairment | 7 | 14 | 8
Collectively evaluated for impairment | 39,793 | 35,148 | 33,982
Acquired with deteriorated credit quality | 8 | 12 | 24
Loans | 39,808 | 35,174 | 34,014
Commercial Real Estate Portfolio Segment [Member] |  |  |
Beginning balance | 3,705 | 4,178 | 1,663
Charge-offs | 0 | (111) | (254)
Recoveries | 3 | 48 | 10
Provision | 1,114 | (410) | 2,759
Ending balance | 4,822 | 3,705 | 4,178
Individually evaluated for impairment | 5 | 9 | 157
Collectively evaluated for impairment | 4,817 | 3,696 | 4,021
Individually evaluated for impairment | 165 | 273 | 3,032
Collectively evaluated for impairment | 622,131 | 515,528 | 453,681
Acquired with deteriorated credit quality | 8,657 | 10,083 | 12,534
Loans | 630,953 | 525,884 | 469,247
Construction Real Estate [Member] |  |  |
Beginning balance | 110 | 97 | 76
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Provision | (47) | 13 | 21
Ending balance | 63 | 110 | 97
Individually evaluated for impairment | 0 | 0 | 0
Collectively evaluated for impairment | 63 | 110 | 97
Individually evaluated for impairment | 0 | 0 | 80
Collectively evaluated for impairment | 14,736 | 19,066 | 16,559
Acquired with deteriorated credit quality | 0 | 0 | 0
Loans | 14,736 | 19,066 | 16,639
Residential Portfolio Segment [Member] |  |  |
Beginning balance | 671 | 1,300 | 640
Charge-offs | 0 | 0 | (8)
Recoveries | 2 | 7 | 19
Provision | 233 | (636) | 649
Ending balance | 906 | 671 | 1,300
Individually evaluated for impairment | 131 | 146 | 254
Collectively evaluated for impairment | 775 | 525 | 1,046
Individually evaluated for impairment | 2,474 | 2,191 | 2,720
Collectively evaluated for impairment | 225,792 | 164,647 | 186,982
Acquired with deteriorated credit quality | 1,650 | 2,043 | 2,804
Loans | 229,916 | 168,881 | 192,506
Unallocated Financing Receivables [Member] |  |  |
Beginning balance | 1,010 | 117 | 282
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Provision | (997) | 893 | (165)
Ending balance | 13 | 1,010 | 117
Individually evaluated for impairment | 0 | 0 | 0
Collectively evaluated for impairment | $ 13 | $ 1,010 | $ 117

X
- Definition The balance of financing receivables that were acquired with deteriorated credit quality. + References No definition available. + Details
Name: | cofs_FinancingReceivableAcquiredWithDeterioratedCreditQuality
Namespace Prefix: | cofs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of increase in allowance for credit loss on financing receivable from recovery. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI https://asc.fasb.org/extlink&oid=122038336&loc=d3e74567-122707 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI https://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
Name: | us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524 + Details
Name: | us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 + Details
Name: | us-gaap_ProvisionForLoanLeaseAndOtherLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

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