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Employee Benefit Plans (Summary of Pentegra Plans) (Details) - Pentegra Defined Benefit Plan for Financial Institutions [Member]	Dec. 31, 2018
Classic Bancshares, Inc. [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Defined Benefit Plan, Funded Percentage	93.01%
Poage Bankshares, Inc. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Defined Benefit Plan, Funded Percentage	98.11%

X

- Definition

Percentage of plan assets to benefit obligation of defined benefit plan.

+ References

No definition available.

+ Details

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X

- Definition

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.

+ References

No definition available.

+ Details

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X

- Details

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X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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X

- Details

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Namespace Prefix:
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Period Type: