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Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Statement [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net revenue | $ 650,525 us-gaap_HealthCareOrganizationRevenue | $ 626,506 us-gaap_HealthCareOrganizationRevenue | $ 595,544 us-gaap_HealthCareOrganizationRevenue | $ 566,338 us-gaap_HealthCareOrganizationRevenue | $ 567,387 us-gaap_HealthCareOrganizationRevenue | $ 554,730 us-gaap_HealthCareOrganizationRevenue | $ 529,180 us-gaap_HealthCareOrganizationRevenue | $ 502,715 us-gaap_HealthCareOrganizationRevenue | $ 2,438,913 us-gaap_HealthCareOrganizationRevenue | $ 2,154,012 us-gaap_HealthCareOrganizationRevenue | $ 1,816,612 us-gaap_HealthCareOrganizationRevenue
Operating expenses: |  |  |  |  |  |  |  |  |  |  |
Practice salaries and benefits | 404,345 us-gaap_LaborAndRelatedExpense | 394,794 us-gaap_LaborAndRelatedExpense | 372,216 us-gaap_LaborAndRelatedExpense | 372,040 us-gaap_LaborAndRelatedExpense | 353,316 us-gaap_LaborAndRelatedExpense | 346,879 us-gaap_LaborAndRelatedExpense | 331,922 us-gaap_LaborAndRelatedExpense | 329,201 us-gaap_LaborAndRelatedExpense | 1,543,395 us-gaap_LaborAndRelatedExpense | 1,361,318 us-gaap_LaborAndRelatedExpense | 1,130,913 us-gaap_LaborAndRelatedExpense
Practice supplies and other operating expenses | 23,549 md_PracticeSuppliesAndOtherOperatingExpenses | 21,570 md_PracticeSuppliesAndOtherOperatingExpenses | 22,466 md_PracticeSuppliesAndOtherOperatingExpenses | 21,417 md_PracticeSuppliesAndOtherOperatingExpenses | 24,027 md_PracticeSuppliesAndOtherOperatingExpenses | 19,445 md_PracticeSuppliesAndOtherOperatingExpenses | 19,416 md_PracticeSuppliesAndOtherOperatingExpenses | 19,500 md_PracticeSuppliesAndOtherOperatingExpenses | 89,002 md_PracticeSuppliesAndOtherOperatingExpenses | 82,388 md_PracticeSuppliesAndOtherOperatingExpenses | 71,823 md_PracticeSuppliesAndOtherOperatingExpenses
General and administrative expenses | 67,641 us-gaap_GeneralAndAdministrativeExpense | 60,643 us-gaap_GeneralAndAdministrativeExpense | 60,829 us-gaap_GeneralAndAdministrativeExpense | 58,414 us-gaap_GeneralAndAdministrativeExpense | 55,636 us-gaap_GeneralAndAdministrativeExpense | 54,654 us-gaap_GeneralAndAdministrativeExpense | 54,601 us-gaap_GeneralAndAdministrativeExpense | 53,318 us-gaap_GeneralAndAdministrativeExpense | 247,527 us-gaap_GeneralAndAdministrativeExpense | 218,209 us-gaap_GeneralAndAdministrativeExpense | 193,540 us-gaap_GeneralAndAdministrativeExpense
Depreciation and amortization | 13,903 us-gaap_DepreciationDepletionAndAmortization | 11,356 us-gaap_DepreciationDepletionAndAmortization | 10,361 us-gaap_DepreciationDepletionAndAmortization | 10,370 us-gaap_DepreciationDepletionAndAmortization | 10,491 us-gaap_DepreciationDepletionAndAmortization | 10,461 us-gaap_DepreciationDepletionAndAmortization | 9,870 us-gaap_DepreciationDepletionAndAmortization | 9,144 us-gaap_DepreciationDepletionAndAmortization | 45,990 us-gaap_DepreciationDepletionAndAmortization | 39,966 us-gaap_DepreciationDepletionAndAmortization | 30,816 us-gaap_DepreciationDepletionAndAmortization
Total operating expenses | 509,438 us-gaap_OperatingExpenses | 488,363 us-gaap_OperatingExpenses | 465,872 us-gaap_OperatingExpenses | 462,241 us-gaap_OperatingExpenses | 443,470 us-gaap_OperatingExpenses | 431,439 us-gaap_OperatingExpenses | 415,809 us-gaap_OperatingExpenses | 411,163 us-gaap_OperatingExpenses | 1,925,914 us-gaap_OperatingExpenses | 1,701,881 us-gaap_OperatingExpenses | 1,427,092 us-gaap_OperatingExpenses
Income from operations | 141,087 us-gaap_OperatingIncomeLoss | 138,143 us-gaap_OperatingIncomeLoss | 129,672 us-gaap_OperatingIncomeLoss | 104,097 us-gaap_OperatingIncomeLoss | 123,917 us-gaap_OperatingIncomeLoss | 123,291 us-gaap_OperatingIncomeLoss | 113,371 us-gaap_OperatingIncomeLoss | 91,552 us-gaap_OperatingIncomeLoss | 512,999 us-gaap_OperatingIncomeLoss | 452,131 us-gaap_OperatingIncomeLoss | 389,520 us-gaap_OperatingIncomeLoss
Investment income | 195 us-gaap_InvestmentIncomeNet | 563 us-gaap_InvestmentIncomeNet | 335 us-gaap_InvestmentIncomeNet | 1,635 us-gaap_InvestmentIncomeNet | 526 us-gaap_InvestmentIncomeNet | 372 us-gaap_InvestmentIncomeNet | 396 us-gaap_InvestmentIncomeNet | 402 us-gaap_InvestmentIncomeNet | 2,728 us-gaap_InvestmentIncomeNet | 1,696 us-gaap_InvestmentIncomeNet | 1,896 us-gaap_InvestmentIncomeNet
Interest expense | (3,313)us-gaap_InterestExpense | (2,019)us-gaap_InterestExpense | (2,188)us-gaap_InterestExpense | (1,371)us-gaap_InterestExpense | (1,046)us-gaap_InterestExpense | (1,507)us-gaap_InterestExpense | (1,673)us-gaap_InterestExpense | (1,189)us-gaap_InterestExpense | (8,891)us-gaap_InterestExpense | (5,415)us-gaap_InterestExpense | (3,245)us-gaap_InterestExpense
Equity in earnings of unconsolidated affiliate | 905 us-gaap_IncomeLossFromEquityMethodInvestments | 725 us-gaap_IncomeLossFromEquityMethodInvestments | 150 us-gaap_IncomeLossFromEquityMethodInvestments |  |  |  |  |  | 1,780 us-gaap_IncomeLossFromEquityMethodInvestments |  |
Total non-operating expenses | (2,213)us-gaap_NonoperatingIncomeExpense | (731)us-gaap_NonoperatingIncomeExpense | (1,703)us-gaap_NonoperatingIncomeExpense | 264 us-gaap_NonoperatingIncomeExpense |  |  |  |  | (4,383)us-gaap_NonoperatingIncomeExpense | (3,719)us-gaap_NonoperatingIncomeExpense | (1,349)us-gaap_NonoperatingIncomeExpense
Income before income taxes | 138,874 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 137,412 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 127,969 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 104,361 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 123,397 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 122,156 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 112,094 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 90,765 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 508,616 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 448,412 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | 388,171 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income tax provision | 50,594 us-gaap_IncomeTaxExpenseBenefit | 51,174 us-gaap_IncomeTaxExpenseBenefit | 48,944 us-gaap_IncomeTaxExpenseBenefit | 40,701 us-gaap_IncomeTaxExpenseBenefit | 44,423 us-gaap_IncomeTaxExpenseBenefit | 45,198 us-gaap_IncomeTaxExpenseBenefit | 42,876 us-gaap_IncomeTaxExpenseBenefit | 35,398 us-gaap_IncomeTaxExpenseBenefit | 191,413 us-gaap_IncomeTaxExpenseBenefit | 167,895 us-gaap_IncomeTaxExpenseBenefit | 147,264 us-gaap_IncomeTaxExpenseBenefit
Net income | 88,280 us-gaap_ProfitLoss | 86,238 us-gaap_ProfitLoss | 79,025 us-gaap_ProfitLoss | 63,660 us-gaap_ProfitLoss |  |  |  |  | 317,203 us-gaap_ProfitLoss | 280,517 us-gaap_ProfitLoss | 240,907 us-gaap_ProfitLoss
Net loss attributable to noncontrolling interests | 118 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (31)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (9)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest |  |  |  |  |  | 78 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest |  |
Net income attributable to MEDNAX, Inc. | $ 88,398 us-gaap_NetIncomeLoss | $ 86,207 us-gaap_NetIncomeLoss | $ 79,016 us-gaap_NetIncomeLoss | $ 63,660 us-gaap_NetIncomeLoss | $ 78,974 us-gaap_NetIncomeLoss | $ 76,958 us-gaap_NetIncomeLoss | $ 69,218 us-gaap_NetIncomeLoss | $ 55,367 us-gaap_NetIncomeLoss | $ 317,281 us-gaap_NetIncomeLoss | $ 280,517 us-gaap_NetIncomeLoss | $ 240,907 us-gaap_NetIncomeLoss
Net income attributable to MEDNAX, Inc.: |  |  |  |  |  |  |  |  |  |  |
Earnings per share, Basic | $ 0.90 us-gaap_EarningsPerShareBasic | $ 0.87 us-gaap_EarningsPerShareBasic | $ 0.80 us-gaap_EarningsPerShareBasic | $ 0.64 us-gaap_EarningsPerShareBasic | $ 0.79 us-gaap_EarningsPerShareBasic | $ 0.77 us-gaap_EarningsPerShareBasic | $ 0.70 us-gaap_EarningsPerShareBasic | $ 0.56 us-gaap_EarningsPerShareBasic | $ 3.22 us-gaap_EarningsPerShareBasic | $ 2.83 us-gaap_EarningsPerShareBasic | $ 2.47 us-gaap_EarningsPerShareBasic
Earnings per share, Diluted | $ 0.89 us-gaap_EarningsPerShareDiluted | $ 0.86 us-gaap_EarningsPerShareDiluted | $ 0.79 us-gaap_EarningsPerShareDiluted | $ 0.63 us-gaap_EarningsPerShareDiluted | $ 0.78 us-gaap_EarningsPerShareDiluted | $ 0.76 us-gaap_EarningsPerShareDiluted | $ 0.68 us-gaap_EarningsPerShareDiluted | $ 0.55 us-gaap_EarningsPerShareDiluted | $ 3.18 us-gaap_EarningsPerShareDiluted | $ 2.78 us-gaap_EarningsPerShareDiluted | $ 2.42 us-gaap_EarningsPerShareDiluted
Weighted average common shares: |  |  |  |  |  |  |  |  |  |  |
Basic | 98,066 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 99,088 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 98,411 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 99,076 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 99,469 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 99,506 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 99,116 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 98,618 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 98,588 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 99,112 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 97,386 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted | 99,129 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 100,145 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 99,866 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 100,696 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 101,080 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 101,178 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 101,098 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 100,784 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 99,887 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 100,969 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 99,382 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

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