COMPUTATION OF NET INCOME PER COMMON SHARE - RECONCILIATION (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]
Net income attributable to The Pennant Group, Inc.	$ 4,337	$ 2,980	$ 3,487	$ 1,334	$ 7,317	$ 4,821
Add: net income attributable to noncontrolling interests	0		200	$ 150	0	350
Net income	$ 4,337		$ 3,687		$ 7,317	$ 5,171
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted average shares outstanding for basic net income per share (in shares)	27,952		27,834		27,922	27,834
Plus: incremental shares from assumed conversion or vesting of restricted stock (in shares)	1,710		0		1,858	0
Adjusted weighted average common shares outstanding for diluted income per share (in share)	29,662		27,834		29,780	27,834
Earnings Per Share, Basic and Diluted [Abstract]
Basic net income per share (in dollars per share)	$ 0.16		$ 0.13		$ 0.26	$ 0.19
Diluted net income per share (in dollars per share)	$ 0.15		$ 0.13		$ 0.25	$ 0.19
Options which are anti-dilutive and not factored into the weighted average common shares amount (in shares)	240				102