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RELATED PARTY TRANSACTIONS (Details) (Officers, Directors, Stockholders and Associates [Member], USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Officers, Directors, Stockholders and Associates [Member]
    
Loans to Related Parties [Roll Forward]    
Balance, beginning of year $ 4,263us-gaap_LoansAndLeasesReceivableRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= czfs_OfficersDirectorsStockholdersAndAssociatesMember		 $ 4,349us-gaap_LoansAndLeasesReceivableRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= czfs_OfficersDirectorsStockholdersAndAssociatesMember
New loans 2,212us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= czfs_OfficersDirectorsStockholdersAndAssociatesMember		 2,119us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= czfs_OfficersDirectorsStockholdersAndAssociatesMember
Repayments (2,161)us-gaap_LoansAndLeasesReceivableRelatedPartiesCollections
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= czfs_OfficersDirectorsStockholdersAndAssociatesMember		 (2,205)us-gaap_LoansAndLeasesReceivableRelatedPartiesCollections
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= czfs_OfficersDirectorsStockholdersAndAssociatesMember
Balance, end of year $ 4,314us-gaap_LoansAndLeasesReceivableRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= czfs_OfficersDirectorsStockholdersAndAssociatesMember		 $ 4,263us-gaap_LoansAndLeasesReceivableRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= czfs_OfficersDirectorsStockholdersAndAssociatesMember