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RESTRICTIONS ON CASH AND DUE FROM BANKS (Details) $ in Thousands	Dec. 31, 2021 USD ($)
RESTRICTIONS ON CASH AND DUE FROM BANKS [Abstract]
Cash FDIC insured amount, maximum	$ 250

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- References

No definition available.

+ Details

Name:	czfs_RestrictionsOnCashAndDueFromBanksAbstract
Namespace Prefix:	czfs_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant