Interest-Bearing Deposits - Summary of Interest-Bearing Deposits (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Banking and Thrift [Abstract]
Demand	$ 179,388us-gaap_DemandDepositAccounts	$ 168,113us-gaap_DemandDepositAccounts
Statement and Passbook Savings	318,859us-gaap_DepositsSavingsDeposits	303,037us-gaap_DepositsSavingsDeposits
Certificates of Deposit: In excess of $100	53,669us-gaap_TimeDeposits100000OrMore	66,561us-gaap_TimeDeposits100000OrMore
Certificates of Deposit : Other	139,531fcza_OtherTimeDeposits	139,586fcza_OtherTimeDeposits
Individual Retirement Accounts	26,770	30,202
Total	$ 718,217	$ 707,499

Other Time Deposits

No definition available.

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- Definition

Time Deposit Individual Retirement Accounts

+ References

No definition available.

+ Details

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- Details

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- Definition

The amount of money in accounts that may bear interest and that the depositor is entitled to withdraw at any time without prior notice.

+ References

+ Details

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- Definition

Amount of interest bearing deposits with no stated maturity, which may include passbook and statement savings accounts and money-market deposit accounts (MMDAs).

+ References

+ Details

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- Definition

The aggregate of all domestic and foreign interest-bearing deposit liabilities.

+ 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 210.9-03.12)

-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 12

-Article 9

+ Details

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- Definition

The aggregate amount of domestic and foreign time deposit liabilities (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $100,000 or more.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 405

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6479006&loc=d3e64164-112818

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Industry Guide

-Number 3

-Section V

-Paragraph A

-Subparagraph 4

+ Details

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