XML 66 R55.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Note 6 - Deposits - Scheduled Maturities of Certificates of Deposit (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
One Year and Under | $ 207,262 | $ 255,575
One to Three Years | 89,495 | 63,327
Three Years and Over | 20,268 | 21,266
| $ 317,025 | $ 340,168

X
- Definition Amount of time deposits maturing in the first year or less. + References No definition available. + Details
Name: | cban_TimeDepositMaturitiesOneYearAndUnder
Namespace Prefix: | cban_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of time deposits maturing from year one to three. + References No definition available. + Details
Name: | cban_TimeDepositMaturitiesYearsOneToThree
Namespace Prefix: | cban_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of time deposits maturing from year 3 and over. + References No definition available. + Details
Name: | cban_TimeDepositMaturitiesYearsThreeAndOver
Namespace Prefix: | cban_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of time deposit liabilities, including certificates of deposit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=50488274&loc=d3e64164-112818 Reference 2: 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=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_TimeDeposits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant