XML 54 R21.htm IDEA: XBRL DOCUMENT
v3.20.1

Fair Value Measurements (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2020
Fair Value Disclosures [Abstract] |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis | The following table presents information about the Company’s financial instruments that are accounted for at fair value on a recurring basis at March 31, 2020 and December 31, 2019 (in thousands):
|  |  |  |  | Fair Value |
|  | Fair Value Category |  |  | March 31, 2020 |  |  | December 31, 2019 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  |  | Level 1 |  |  | $ | 6,357 |  |  | $ | 16,775 |
Short-term investments |  |  | Level 2 |  |  |  | 85,041 |  |  |  | 74,510 |
Mutual Funds |  |  | Level 1 |  |  |  | 11,640 |  |  |  | 14,264 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration |  |  | Level 3 |  |  |  | 1,288 |  |  |  | 2,696 |
Financial Instruments Measured At Carrying Amount | The following table presents information about the Company’s financial instruments that are not carried at fair value at March 31, 2020 and December 31, 2019 (in thousands):
|  | March 31, 2020 |  |  | December 31, 2019 |
|  | Carrying Amount |  |  | Fair Value |  |  | Carrying Amount |  |  | Fair Value |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2023 Notes |  |  | 750,000 |  |  |  | 611,250 |  |  |  | 750,000 |  |  |  | 766,875 |
2027 Notes |  |  | 1,000,000 |  |  |  | 801,200 |  |  |  | 1,000,000 |  |  |  | 1,025,600 |

X
- Definition Tabular disclosure of financial instruments measured at carrying amount. + References No definition available. + Details
Name: | md_FinancialInstrumentsMeasuredAtCarryingAmountTableTextBlock
Namespace Prefix: | md_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration