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Stock-Based Compensation - Narrative (Details)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended
Jun. 01, 2014
company
shares
Mar. 31, 2020
USD ($)
installment
$ / shares
shares
Jan. 31, 2020
$ / shares
shares
Mar. 31, 2020
USD ($)
installment
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of separate and independent companies after spin-off | company 2      
Unamortized stock-based compensation expense related to unvested awards | $   $ 8.3   $ 8.3
Weighted average remaining vesting period related to expense recognition       3 years
Ensign Employees        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock award conversion ratio related to the spin-off 1      
Restricted Stock Award | Ensign Employees        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock awards unvested during spin-off (in shares) 207,580      
Unvested stock awards outstanding (in shares)   1,760   1,760
Restricted Stock Award | Officers and Employees        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of awards granted (in shares)   107,790 27,000  
Award grant date fair value (in usd per share) | $ / shares   $ 19.06 $ 22.18  
Number of equal annual vesting installments | installment   4   4
Performance Stock Award | Officers        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of awards granted (in shares)   107,790    
Award grant date fair value (in usd per share) | $ / shares   $ 19.06    
Vesting metric, Normalized Funds from Operations, minimum   5.00%   5.00%
Minimum | Performance Stock Award | Officers        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period range (in years)   1 year    
Maximum | Performance Stock Award | Officers        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period range (in years)   4 years