XML 49 R32.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Summary of Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2015
Summary Of Significant Accounting Policies Tables |
Schedule of accumulated other comprehensive income | Accumulated other comprehensive income was as follows:
(Dollars in thousands) |  | Years ended December 31, |
|  | 2015 |  | 2014 |
Unrealized gains on available for sale securities |  |  | 1,632 |  |  | 1,401 |
Unrecognized gains on post-retirement benefits |  |  | 191 |  |  | 225 |
Tax effect |  |  | (620 | ) |  | (553 | )
Accumulated other comprehensive income |  | $ | 1,203 |  | $ | 1,073 |

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

X
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration