Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Additional Information (Detail)

v3.6.0.2
Intangible Assets - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]    
Amortization of intangible assets $ 3,849 $ 2,884
Physician and Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining lives 8 years  
Non-Compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining lives 1 year  
Software [Member]    
Finite-Lived Intangible Assets [Line Items]    
Weighted average remaining lives 3 years