Investments in Affiliated Companies - Additional Information (Detail)	Sep. 30, 2015
HopFed Capital Trust [Member] \| Majority-Owned Subsidiary, Unconsolidated [Member]
Schedule of Investments [Line Items]
Percent of common stock of HopFed Bancorp, Inc.	100.00%

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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