Condensed Parent Company Only Financial Statements - Summary of Condensed Statements of Income (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest and dividend income:
Total interest and dividend income	$ 9,474	$ 9,344	$ 9,115	$ 8,798	$ 8,541	$ 8,635	$ 8,419	$ 8,160	$ 36,731	$ 33,755	$ 31,727
Interest expense	2,496	2,231	1,835	1,612	1,566	1,537	1,454	1,406	8,174	5,963	5,299
Non-interest expenses	6,724	7,512	7,574	7,540	7,806	7,168	7,233	7,689	29,350	29,896	29,856
Income tax benefits	$ 368	$ 180	$ 323	$ 196	$ 1,159	$ 486	$ 368	$ 135	1,067	2,148	362
HopFed [Member]
Interest and dividend income:
Dividend income from subsidiary Bank									2,500	2,500	2,000
Total interest and dividend income									2,500	2,500	2,000
Interest expense									538	436	388
Non-interest expenses									964	1,538	391
Total expenses									1,502	1,974	779
Income before income taxes and equity in undistributed earnings of subsidiary									998	526	1,221
Income tax benefits									(291)	(545)	(319)
Income before equity in undistributed earnings of subsidiary									1,289	1,071	1,540
Equity in earnings of subsidiary									4,380	2,230	1,364
Income available to common shareholders									$ 5,669	$ 3,301	$ 2,904