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Allowance for Loan Losses - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 Loans SecurityLoan | Dec. 31, 2013 SecurityLoan
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Historical loss percentage period for portfolio segments | 3 years |
Allowance for loan losses | $ 14,268 us-gaap_LoansAndLeasesReceivableAllowance | $ 16,528 us-gaap_LoansAndLeasesReceivableAllowance
Number Of Loans Charged Off | 11 fcza_NumberOfLoansChargedOff |
Provision for loan losses | 1,500 us-gaap_ProvisionForLoanAndLeaseLosses | 1,100 us-gaap_ProvisionForLoanAndLeaseLosses
Number of days past due for loans to be considered as nonperforming | 90 days |
Reasonable period for nonperforming TDRs to be returned to performing status | 6 months |
Number of days reaching where loans are considered for nonaccrual status | 90 days |
Conditions where loans are considered for nonaccrual status | A loan may be returned to accruing status only if one of three conditions are met the loan is well-secured and none of the principal and interest has been past due for a minimum of 90 days; the loan is a TDR and has made a minimum of six months payments; or the principal and interest payments are reasonably assured and a sustained period of performance has occurred, generally six months. |
Defaulted loans | 0 fcza_NumberOfDefaultsOnLoans | 0 fcza_NumberOfDefaultsOnLoans
Impaired loans | Greater than $500 |
Company Collateral [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Provision for loan losses | 1,436 us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcza_CompanyCollateralMember |
TDRs [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Allowance for loan losses | $ 895 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = fcza_TroubledDebtRestructuresMember |

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- Definition Loans Classified As Non Accrual Description + References No definition available. + Details
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- Definition Number of defaults on loans. + References No definition available. + Details
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- Definition Number of loans charged off. + References No definition available. + Details
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- Definition Period used for calculating historical loss percentages for all portfolio segments. + References No definition available. + Details
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- Definition Number of days a loan must be delinquent to be considered nonaccrual. + References No definition available. + Details
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- Definition Number of days past due for loans to be considered as nonperforming. + References No definition available. + Details
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- Definition Range of amount of impaired loans tested for impairment. + References No definition available. + Details
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- Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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- Definition Amount of expense related to estimated loss from loan and lease transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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