Investments in Affiliated Companies - Summary Statements of Income (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Schedule of Equity Method Investments [Line Items]
Income - interest income from subordinated debentures issued by HopFed Bancorp, Inc.	$ 8,081	$ 9,195
Majority-Owned Subsidiary, Unconsolidated [Member]
Schedule of Equity Method Investments [Line Items]
Income - interest income from subordinated debentures issued by HopFed Bancorp, Inc.	97	85
Net income	$ 97	$ 85