XML 17 R28.htm IDEA: XBRL DOCUMENT v3.2.0.727
Business Acquisitions - Additional Information (Detail)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
Acquisition
Company
Dec. 31, 2014
USD ($)
Business Acquisition [Line Items]      
Number of physician group practices acquired | Company   7  
Business acquisition, total consideration   $ 596,000  
Payments to acquire business, net of cash acquired   568,900  
Contingent consideration $ 3,800 $ 3,800  
Number of anesthesiology practices acquired | Company   4  
Number of neonatology practices acquired | Company   2  
Number of other pediatric subspecialty practices acquired | Company   1  
Number of business acquired | Acquisition   8  
Cash acquired from acquisition   $ 23,000  
Business acquisition, other current liabilities 300 300  
Goodwill deductible for tax purposes 10,800 $ 10,800  
Time period for achievement of certain performance measures for payment of contingent consideration, years   2 years  
Assumed payment probability of contingent consideration payment   100.00%  
Range of the undiscounted amount under contingent consideration agreement, low 0 $ 0  
Range of the undiscounted amount under contingent consideration agreement, high 4,000 4,000  
Contingent consideration decrease in fair value 800    
Contingent consideration payments related to prior-period acquisitions   5,400  
Goodwill 3,163,866 3,163,866 $ 2,776,188
Prior-Period Acquisitions [Member]      
Business Acquisition [Line Items]      
Goodwill 3,900 3,900  
Other intangible assets 5,300 5,300  
Other long-term liabilities 2,000 2,000  
Additional cash consideration related to a working capital   600  
Radiology Physician Services and Telemedicine Company [Member]      
Business Acquisition [Line Items]      
Business acquisition, total consideration   508,200  
Business acquisition, base consideration   500,000  
Business acquisition, other closing consideration   8,200  
Goodwill 383,829 383,829  
Other intangible assets 227,993 227,993  
Other long-term liabilities $ 34,275 $ 34,275  
Minimum [Member]      
Business Acquisition [Line Items]      
Assumed discount rates for acquisition-date fair value   2.80%  
Maximum [Member]      
Business Acquisition [Line Items]      
Assumed discount rates for acquisition-date fair value   3.50%