Consolidated Statements of Income (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Income Statement [Abstract]    
Net revenue $ 180,771 $ 172,726
Operating expenses:    
Cost of services—physician practice salaries, benefits and other 134,167 127,273
General and administrative 29,792 27,607
Net change in fair value of contingent consideration 4,684 (383)
Depreciation and amortization 1,515 1,265
Total operating expenses 170,158 155,762
Income from operations 10,613 16,964
Investment income 1 1
Interest expense (277) (314)
Income before income taxes 10,337 16,651
Income tax provision 3,927 6,377
Net income $ 6,410 $ 10,274
Net income per share:    
Basic (usd per share) $ 0.37 $ 0.60
Diluted (usd per share) $ 0.36 $ 0.58