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Goodwill and Other Intangibles, Net - Schedule of Changes in Goodwill by Segment (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Goodwill [Roll Forward]    
Balance at beginning of period $ 290,694 $ 240,019
Goodwill from acquisitions 16,561 51,050
Goodwill related to noncontrolling interests 1,275 36
Goodwill related to disposal   (411)
Goodwill related to prior period net working capital adjustments 1,213  
Balance at end of period 307,317 290,694
Home Health Reporting Unit [Member]    
Goodwill [Roll Forward]    
Balance at beginning of period 202,995 196,296
Goodwill from acquisitions 6,760 7,069
Goodwill related to noncontrolling interests 580 14
Goodwill related to disposal   (384)
Goodwill related to prior period net working capital adjustments (504)  
Balance at end of period 210,839 202,995
Hospice Reporting Unit [Member]    
Goodwill [Roll Forward]    
Balance at beginning of period 58,136 14,793
Goodwill from acquisitions 7,460 43,343
Goodwill related to noncontrolling interests 355  
Goodwill related to prior period net working capital adjustments 1,717  
Balance at end of period 64,234 58,136
Community Based Reporting Unit [Member]    
Goodwill [Roll Forward]    
Balance at beginning of period 17,972 17,339
Goodwill from acquisitions 848 638
Goodwill related to noncontrolling interests   22
Goodwill related to disposal   (27)
Balance at end of period 18,820 17,972
Facility Based Reporting Unit [Member]    
Goodwill [Roll Forward]    
Balance at beginning of period 11,591 11,591
Goodwill from acquisitions 1,493  
Goodwill related to noncontrolling interests 340  
Balance at end of period $ 13,424 $ 11,591