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Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Jun. 30, 2013
Life Insurance Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit plan expense		$ (2)		$ 12
Accrued interest payable and other liabilities Total		$ 213		216
401 (k) plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Percentage of amount allowable under federal tax regulations		25.00%
Percentage of compensation contributed under federal tax regulations		8.00%
Benefit plan expense		$ 52		28
Salary Continuation Agreement [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit plan expense		11		12
Accrued interest payable and other liabilities Total		233		$ 247
Annual benefit for 20 years		$ 25
Duration of Annual benefit		20 years
Multi-employer pension plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Unfunded liability			$ 36		$ 35
CFBank's contributions			$ 64
Funded status			96.52%		96.51%
Total contributions made to Pentegra DB Plan					$ 190,752	$ 136,478
Percentage of amount allowable under federal tax regulations					5.00%	5.00%
Multi-employer pension plan [Member] | Scenario, Forecast [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
CFBank's contributions	$ 22

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- Definition

Defined Benefit Plan Annual Cost or Change

+ References

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- Definition

Defined Benefit Plan Estimated Annual Benefits Payment Period

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- Definition

Defined Benefit Plan Unfunded Liability

+ References

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- Definition

Plan assets of a defined benefit plan, as a percentage of projected benefit obligation.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

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- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

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- Definition

The amount of cash or cash equivalents contributed during the reporting period by the entity to fund its pension plans and its non-pension postretirement benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
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The amount of pension and other (such as medical, dental and life insurance) postretirement benefit costs recognized during the period for (1) defined benefit plans (periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss) on assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments) and for (2) defined contribution plans (to the extent that a plan's defined contributions to an individual's account are to be made for periods in which that individual renders services, the net cost for a period is the contribution called for in that period; if a plan calls for contributions for periods after an individual retires or terminates, the estimated cost is accrued during the employee's service period).

+ References

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-Name Accounting Standards Codification
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-Section 50
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- Definition

This represents the entire liability recognized in the balance sheet that is associated with the defined benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=21915240&loc=d3e1703-114919

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