Real Estate Owned - Covered Real Estate Owned (Details) (USD $)	6 Months Ended	12 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014
Other Real Estate, Covered [Roll Forward]
Balance, beginning of period	$ 5,557,927us-gaap_OtherRealEstateCovered	$ 14,068,846us-gaap_OtherRealEstateCovered	$ 14,068,846us-gaap_OtherRealEstateCovered
Proceeds from real estate sold	(3,235,758)us-gaap_OtherRealEstateCoveredDisposals		(12,348,078)us-gaap_OtherRealEstateCoveredDisposals
Gain on real estate sold	750,204	373,918
Provision for losses on real estate owned recognized in noninterest expense	(188,706)		(254,408)
Increase of FDIC receivable for loss sharing agreements	(789,792)		(1,330,943)
Principal reductions, covered	(59,308)chfn_PrincipalReductionsCovered		(130,090)chfn_PrincipalReductionsCovered
Transfer of previously covered non-single family OREO	(167,006)		(420,000)
Balance, end of period	3,343,384us-gaap_OtherRealEstateCovered		5,557,927us-gaap_OtherRealEstateCovered
Acquired through foreclosure of loans receivable
Other Real Estate, Covered [Roll Forward]
Real estate acquired through foreclosure of loans receivable	1,489,028		4,405,516
Recognized in noninterest expense
Other Real Estate, Covered [Roll Forward]
Gain on real estate sold	132,592		217,408
Payable to the FDIC
Other Real Estate, Covered [Roll Forward]
Gain on real estate sold	$ 604,407		$ 1,349,676

Other Real Estate, Covered, Gain (Loss) on Sale

No definition available.

Name:	chfn_OtherRealEstateCoveredGainLossonSale
Namespace Prefix:	chfn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Other Real Estate, Covered, Increase (Decrease) in FDIC Receivable from Loss Sharing Agreements

+ References

No definition available.

+ Details

Name:	chfn_OtherRealEstateCoveredIncreaseDecreaseinFDICReceivablefromLossSharingAgreements
Namespace Prefix:	chfn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Payments received subsequent to property being transferred into covered other real estate owned and applied against the principal value of the property.

+ References

No definition available.

+ Details

Name:	chfn_PrincipalReductionsCovered
Namespace Prefix:	chfn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Transfer of previously covered NCB non-single family OREO to non-covered

+ References

No definition available.

+ Details

Name:	chfn_TransferofpreviouslycoveredNCBnonsinglefamilyOREOtononcovered
Namespace Prefix:	chfn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Carrying amount of other real estate covered by loss sharing agreements not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations that may also be included in real estate owned. Excludes real estate assets taken in settlement of troubled loans through surrender or foreclosure by banks.

+ References

No definition available.

+ Details

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

- Definition

Additions of other real estate covered by loss sharing agreements not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations that may also be included in real estate owned. Excludes real estate assets taken in settlement of troubled loans through surrender or foreclosure by banks.

+ References

No definition available.

+ Details

Name:	us-gaap_OtherRealEstateCoveredAdditions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Disposals of other real estate covered by loss sharing agreements not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations that may also be included in real estate owned. Excludes real estate assets taken in settlement of troubled loans through surrender or foreclosure by banks.

+ References

No definition available.

+ Details

Name:	us-gaap_OtherRealEstateCoveredDisposals
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_OtherRealEstateCoveredRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Valuation adjustments made to other real estate covered by loss sharing agreements not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations that may also be included in real estate owned. Excludes real estate assets taken in settlement of troubled loans through surrender or foreclosure by banks.

+ References

No definition available.

+ Details

Name:	us-gaap_OtherRealEstateCoveredValuationAdjustments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	chfn_OtherRealEstateOwnedAxis=chfn_ForeclosureOfLoansReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	chfn_OtherRealEstateOwnedAxis=chfn_PayabletotheFDICMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	chfn_OtherRealEstateOwnedAxis=chfn_RecognizedinnoninterestexpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: