XML 124 R111.htm IDEA: XBRL DOCUMENT
v3.21.1

Note 17 - Financial Instruments - Financial Instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Equity securities at fair value (Note 2) | $ 2,896 | $ 2,851
Securities available for sale (Note 2) | 574,787 | 339,579
Loans to other financial institutions | 35,209 | 51,048
Deposits – noninterest-bearing (Note 8) | 477,654 | 287,460
Deposits – interest-bearing (Note 8) | 1,196,924 | 867,142
Reported Value Measurement [Member] |  |
Cash and cash equivalents | 79,519 | 59,558
Equity securities at fair value (Note 2) | 2,896 | 2,851
Securities available for sale (Note 2) | 574,787 | 339,579
Federal Home Loan Bank and Federal Reserve Bank stock | 8,004 | 6,458
Loans held for sale | 12,921 | 3,095
Loans to other financial institutions | 35,209 | 51,048
Loans, net | 1,062,075 | 797,991
Accrued interest receivable | 6,521 | 3,965
Interest rate lock commitments | 842 | 68
Deposits – noninterest-bearing (Note 8) | 477,654 | 287,460
Deposits – interest-bearing (Note 8) | 1,196,924 | 867,142
Borrowings | 9,327 |
Subordinated debentures | 3,089 |
Accrued interest payable | 183 | 411
Borrowings |  | 33,198
Estimate of Fair Value Measurement [Member] |  |
Cash and cash equivalents | 79,519 | 59,558
Equity securities at fair value (Note 2) | 2,896 | 2,851
Securities available for sale (Note 2) | 574,787 | 339,579
Federal Home Loan Bank and Federal Reserve Bank stock | 8,004 | 6,458
Loans held for sale | 13,350 | 3,134
Loans to other financial institutions | 35,209 | 51,048
Loans, net | 1,057,786 | 793,270
Accrued interest receivable | 6,521 | 3,965
Interest rate lock commitments | 842 | 68
Deposits – noninterest-bearing (Note 8) | 477,654 | 287,460
Deposits – interest-bearing (Note 8) | 1,197,964 | 867,154
Borrowings | 9,143 |
Subordinated debentures | 3,089 |
Accrued interest payable | 183 | 411
Borrowings |  | 33,243
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Cash and cash equivalents | 79,519 | 59,558
Equity securities at fair value (Note 2) | 1,411 | 1,379
Securities available for sale (Note 2) | 0 | 0
Federal Home Loan Bank and Federal Reserve Bank stock | 0 | 0
Loans held for sale | 0 | 0
Loans to other financial institutions | 0 | 0
Loans, net | 0 | 0
Accrued interest receivable | 0 | 0
Interest rate lock commitments | 0 | 0
Deposits – noninterest-bearing (Note 8) | 0 | 0
Deposits – interest-bearing (Note 8) | 0 | 0
Borrowings | 0 |
Subordinated debentures | 0 |
Accrued interest payable | 0 | 0
Borrowings |  | 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Cash and cash equivalents | 0 | 0
Equity securities at fair value (Note 2) | 0 | 0
Securities available for sale (Note 2) | 563,364 | 327,212
Federal Home Loan Bank and Federal Reserve Bank stock | 8,004 | 6,458
Loans held for sale | 13,350 | 3,134
Loans to other financial institutions | 35,209 | 51,048
Loans, net | 0 | 0
Accrued interest receivable | 6,521 | 3,965
Interest rate lock commitments | 842 | 68
Deposits – noninterest-bearing (Note 8) | 477,654 | 287,460
Deposits – interest-bearing (Note 8) | 1,197,964 | 867,154
Borrowings | 9,143 |
Subordinated debentures | 3,089 |
Accrued interest payable | 183 | 411
Borrowings |  | 33,243
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Cash and cash equivalents | 0 | 0
Equity securities at fair value (Note 2) | 1,485 | 1,472
Securities available for sale (Note 2) | 11,423 | 12,367
Federal Home Loan Bank and Federal Reserve Bank stock | 0 | 0
Loans held for sale | 0 | 0
Loans to other financial institutions | 0 | 0
Loans, net | 1,057,786 | 793,270
Accrued interest receivable | 0 | 0
Interest rate lock commitments | 0 | 0
Deposits – noninterest-bearing (Note 8) | 0 | 0
Deposits – interest-bearing (Note 8) | 0 | 0
Borrowings | 0 |
Subordinated debentures | 0 |
Accrued interest payable | $ 0 | 0
Borrowings |  | $ 0

X
- Definition Fair value portion of accrued interest payable. + References No definition available. + Details
Name: | cofs_AccruedInterestPayableFairValueDisclosure
Namespace Prefix: | cofs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents fair value of accrued interest receivable. + References No definition available. + Details
Name: | cofs_AccruedInterestReceivableFairValueDisclosure
Namespace Prefix: | cofs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the fair value portion of Federal Home Loan Bank Borrowings and Term Loans. + References No definition available. + Details
Name: | cofs_FederalHomeLoanBankBorrowingsAndTermLoansFairValueDisclosure
Namespace Prefix: | cofs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents fair value portion of interest rate lock commitments. + References No definition available. + Details
Name: | cofs_InterestRateLockCommitmentsFairValueDisclosure
Namespace Prefix: | cofs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount related to loans to other financial institutions. + References No definition available. + Details
Name: | cofs_LoansAndLeasesReceivableOtherFinancialInstitution
Namespace Prefix: | cofs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
Name: | us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=99377092&loc=SL75136599-209740 + Details
Name: | us-gaap_EquitySecuritiesFvNi
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value portion of borrowing from Federal Home Loan Bank (FHLBank). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(3)(a)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of Federal Home Loan Bank (FHLB) and Federal Reserve Bank stock. + References No definition available. + Details
Name: | us-gaap_FederalHomeLoanBankStockAndFederalReserveBankStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The aggregate of all domestic and foreign interest-bearing deposit liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_InterestBearingDepositLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables. + References No definition available. + Details
Name: | us-gaap_LoansHeldForSaleFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
Name: | us-gaap_LoansReceivableFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The aggregate amount of all domestic and foreign noninterest-bearing deposits liabilities held by the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_NoninterestBearingDepositLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_CarryingReportedAmountFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |