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Benefit Plans - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended									6 Months Ended		12 Months Ended				6 Months Ended
	Dec. 31, 2012 Life Insurance Benefits [Member]	Dec. 31, 2011 Life Insurance Benefits [Member]	Dec. 31, 2010 Life Insurance Benefits [Member]	Dec. 31, 2012 401 (k) plan [Member]	Dec. 31, 2011 401 (k) plan [Member]	Dec. 31, 2010 401 (k) plan [Member]	Dec. 31, 2012 Salary Continuation Agreement [Member]	Dec. 31, 2011 Salary Continuation Agreement [Member]	Dec. 31, 2010 Salary Continuation Agreement [Member]	Jun. 30, 2011 Multi-employer pension plan [Member]	Jun. 30, 2010 Multi-employer pension plan [Member]	Dec. 31, 2012 Multi-employer pension plan [Member]	Jul. 01, 2012 Multi-employer pension plan [Member]	Jun. 30, 2012 Multi-employer pension plan [Member]	Jul. 01, 2011 Multi-employer pension plan [Member]	Jun. 30, 2013 Multi-employer pension plan [Member] Scenario, Forecast [Member]	Jun. 30, 2012 Multi-employer pension plan [Member] Scenario, Forecast [Member]	Jun. 30, 2011 Multi-employer pension plan [Member] Scenario, Forecast [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Unfunded liability										$ 277				$ 38
CFBank's contributions																49	91	60
Funded status													96.83%		80.00%
Total contributions made to Pentegra DB Plan										299,729	203,582
Percentage of amount allowable under federal tax regulations				25.00%								5.00%
Plan Expense				33	20	39
Percentage of compensation contributed under federal tax regulations				8.00%
Expense related to CFBank	16	10	7				47	16	17
Accrued interest payable and other liabilities Total	205	189					273	251
Annual benefit for 20 years							$ 25
Duration of Annual benefit							20 years

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

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

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

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Maximum percentage of employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan.

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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.

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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).

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

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