OPTIONS AND AWARDS - ADDITIONAL INFORMATION (Details) - The Ensign Plans $ in Thousands	6 Months Ended
Jun. 30, 2020 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized share-based compensation expense	$ 20,724
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested stock options	$ 6,631
Unvested options and stock awards, cost net yet recognized, period for recognition	4 years 4 months 24 days
Options, vesting percent per year	20.00%
Options, expiration period	10 years
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested Restricted Stock	$ 14,093
Unvested options and stock awards, cost net yet recognized, period for recognition	2 years 3 months 18 days
Vesting period	5 years

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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