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Common and Common Equivalent Shares - Schedule of Calculation of Shares Used in Basic and Diluted Net Income Per Share (Parenthetical) (Details) - shares shares in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2024 | Jun. 30, 2024
Earnings Per Share [Abstract] |  |
Incremental shares | 0.1 | 0.3

X
- Definition Additional shares not included in the calculation of diluted EPS as a result of the potentially antidilutive effect of contingently issuable shares. + References No definition available. + Details
Name: | md_IncrementalCommonSharesAttributableToAntidilutiveEffectOfContingentlyIssuableShares
Namespace Prefix: | md_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration