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OPTIONS AND AWARDS - OPTIONS GRANTED (Details) - The Ensign Plans
shares in Thousands
3 Months Ended
Mar. 31, 2020
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Options granted (in shares) | shares 169
2019  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Options granted (in shares) | shares 169
Weighted average exercise price (in dollars per share) | $ / shares $ 18.22
Weighted average fair value of options (in dollars per share) | $ / shares $ 9.21
2019 | Stock options  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Weighted average risk-free rate 0.70%
Expected life 6 years 6 months
Weighted average volatility 35.80%
Weighted average dividend yield 0.00%