XML 49 R36.htm IDEA: XBRL DOCUMENT
v3.21.1

Note 4 - Mortgage Banking (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Notes Tables |
Schedule of Activity in Secondary Market Loans [Table Text Block] |
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Loans originated for resale, net of principal payments |  | $ | 326,286 |  |  | $ | 63,920 |  |  | $ | 33,555 |
Proceeds from loan sales |  |  | 325,306 |  |  |  | 62,763 |  |  |  | 34,872 |
Net gains on sales of loans held for sale |  |  | 11,313 |  |  |  | 1,951 |  |  |  | 1,003 |
Loan servicing fees, net of amortization |  |  | (129 | ) |  |  | 82 |  |  |  | 91 |
Servicing Asset at Amortized Cost [Table Text Block] |
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Balance, beginning of year |  | $ | 2,131 |  |  | $ | 1,049 |  |  | $ | 908 |
Capitalized |  |  | 3,554 |  |  |  | 822 |  |  |  | 441 |
Amortization |  |  | (1,344 | ) |  |  | (453 | ) |  |  | (300 | )
Market valuation allowance change |  |  | (374 | ) |  |  | - |  |  |  | - |
Acquired from merger with County Bank Corp. |  |  | - |  |  |  | 713 |  |  |  | - |
Balance, end of year |  | $ | 3,967 |  |  | $ | 2,131 |  |  | $ | 1,049 |

X
- Definition Tabular disclosure of activity in secondary market loans. + References No definition available. + Details
Name: | cofs_ScheduleOfActivityInSecondaryMarketLoansTableTextBlock
Namespace Prefix: | cofs_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of activity in the balance of servicing assets subsequently measured at amortized cost. Includes, but is not limited to, beginning and ending balances, additions, disposals, and amortization. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746 + Details
Name: | us-gaap_ScheduleOfServicingAssetsAtAmortizedValueTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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