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Other Income and Other Expense - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Other Income and Expenses [Abstract]
Write-down on OREO
$ 234,042
$ 220,419
$ 0
X
- Definition
Write Downs Of Other Real Estate Owned To Fair Value
+ References
No definition available.
+ Details
Name:
cizn_WriteDownsOfOtherRealEstateOwnedToFairValue
Namespace Prefix:
cizn_
Data Type:
xbrli:monetaryItemType
Balance Type:
debit
Period Type:
duration
X
- References
No definition available.
+ Details
Name:
us-gaap_OtherIncomeAndExpensesAbstract
Namespace Prefix:
us-gaap_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration