Investments in Affiliated Companies - Summary Statements of Financial Condition (Detail) - Majority-Owned Subsidiary, Unconsolidated [Member] - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets - investment in subordinated debentures issued by HopFed Bancorp, Inc.	$ 10,310	$ 10,310
Liabilities	0	0
Total stockholders' equity	10,310	10,310
Trust Preferred Securities [Member]
Total stockholders' equity	10,000	10,000
Common Stock [Member]
Total stockholders' equity	$ 310	$ 310