Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Additional Information (Detail)

v2.4.1.9
Intangible Assets - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets $ 2,516us-gaap_AmortizationOfIntangibleAssets $ 2,618us-gaap_AmortizationOfIntangibleAssets  
Physician and Customer Relationships [Member]      
Finite-Lived Intangible Assets [Line Items]      
Weighted average remaining lives     8 years
Software [Member]      
Finite-Lived Intangible Assets [Line Items]      
Weighted average remaining lives     3 years
Maximum [Member] | Non-Compete Agreements [Member]      
Finite-Lived Intangible Assets [Line Items]      
Weighted average remaining lives     1 year