XML 21 R24.htm IDEA: XBRL DOCUMENT v2.4.0.6
Business Acquisitions (Narrative) (Detail) (USD $)
In Millions, unless otherwise specified
 6 Months Ended 6 Months Ended
Jun. 30, 2012
Year
Company
Jun. 30, 2012
Prior-Period Acquisitions [Member]
Dec. 31, 2011
Prior-Period Acquisitions [Member]
Jun. 30, 2012
Minimum [Member]
Jun. 30, 2012
Maximum [Member]
Business Acquisition [Line Items]          
Number of physician group practices acquired 7        
Business acquisition, total consideration $ 70.6        
Cash consideration 63.1        
Contingent consideration 6.1        
Current liabilities 1.4        
Goodwill recorded in connection with acquisitions 58.1 60.9      
Other intangible assets 13.6        
Fixed assets 0.3        
Other liabilities 1.4        
Time period for achievement of certain performance measures for payment of contingent consideration, years 5        
Assumed discount rates for acquisition-date fair value       3.00% 5.00%
Assumed payment probability of contingent consideration payment 100.00%        
Range of the undiscounted amount under contingent consideration agreement, low 0        
Range of the undiscounted amount under contingent consideration agreement, high 6.7        
Contingent consideration payments accrual related to prior-period acquisitions   9.0 6.2    
Goodwill deductible for tax purpose   $ 35.5