Juniata Valley Financial Corp. (Parent Company Only) Financial Information (Schedule of Condensed Statements of Income and Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income from unconsolidated subsidiary		$ 296
Merger-related expenses		884
Other non-interest expense	$ 20,407	19,461
Income tax (benefit) expense	(14)	(659)
Net income	5,835	5,904
Comprehensive income	10,733	5,795
Parent Company [Member]
Interest and dividends on investment securities available for sale	47	44
Dividends from bank subsidiary	4,489	4,923
Income from unconsolidated subsidiary		296
Change in value of equity securities	8	26
Total income	4,544	5,289
Merger-related expenses		134
Other non-interest expense	176	155
Total expense	176	289
Income before income taxes and equity in undistributed net income of subsidiary	4,368	5,000
Income tax (benefit) expense	(35)	(347)
Net income, Including Portion attributable to subsidiary	4,403	5,347
Undistributed net gain of subsidiary	1,432	557
Net income	$ 5,835	$ 5,904