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Subsequent Events - Additional Information (Detail) - Rehabilitation Hospital with Covenant Health System [Member] - Germany [Member]
€ in Millions
6 Months Ended
Jul. 31, 2017
EUR (€)
Hospital
Jul. 20, 2016
EUR (€)
Hospital
Jun. 30, 2017
EUR (€)
Hospital
Subsequent Event [Line Items]      
Number of facilities acquired | Hospital   20  
Acquisition costs | €   € 215.7  
Number of facilities closed | Hospital     18
Proceeds from facilities closed | €     € 176.5
Subsequent Event [Member]      
Subsequent Event [Line Items]      
Number of facilities closed | Hospital 2    
Proceeds from facilities closed | € € 39.2