COMPUTATION OF NET INCOME PER COMMON SHARE - NARRATIVE (Details) - Subsequent event shares in Thousands	Oct. 01, 2019 shares
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Spin-Off transaction, distribution ratio	0.50
Common stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Shares issued (in shares)	27,834
Ensign Group Shareholders | Common stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Shares issued (in shares)	26,674
Noncontrolling Interest Holders | Common stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Shares issued (in shares)	1,160