Investments in Affiliated Companies - Summary Statements of Financial Condition (Parenthetical) (Detail)	Sep. 30, 2015	Dec. 31, 2014
Majority-Owned Subsidiary, Unconsolidated [Member] \| Common Stock [Member]
Percent of common stock of HopFed Bancorp, Inc.	100.00%	100.00%

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant