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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Cash and Cash Equivalents (Details) | 12 Months Ended
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Dec. 31, 2021
Cash and Cash Equivalents [Abstract] |
Interest earning deposits maturity, Maximum for inclusion as cash equivalents | 90 days

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- Definition The minimum number of days maturity for interest-earning deposits to be considered cash equivalents. + References No definition available. + Details
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Namespace Prefix: | czfs_
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- References No definition available. + Details
Name: | us-gaap_CashAndCashEquivalentsAbstract
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