Condensed Consolidated Statements of Income (Unaudited) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Income Statement [Abstract]    
Net revenue $ 639,395 $ 566,338
Operating expenses:    
Practice salaries and benefits 419,595 372,040
Practice supplies and other operating expenses 23,431 21,417
General and administrative expenses 67,936 58,414
Depreciation and amortization 13,612 10,370
Total operating expenses 524,574 462,241
Income from operations 114,821 104,097
Investment income 142 1,635
Interest expense (3,267) (1,371)
Equity in earnings of unconsolidated affiliate 821  
Total non-operating (expenses) income (2,304) 264
Income before income taxes 112,517 104,361
Income tax provision 43,928 40,701
Net income 68,589 63,660
Net loss attributable to noncontrolling interests 118  
Net income attributable to MEDNAX, Inc. $ 68,707 $ 63,660
Net income attributable to MEDNAX, Inc.:    
Earnings per share, Basic $ 0.73 $ 0.64
Earnings per share, Diluted $ 0.72 $ 0.63
Weighted average common shares:    
Basic 94,231 99,076
Diluted 95,325 100,696