XML 30 R20.htm IDEA: XBRL DOCUMENT v3.21.1

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2021

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, 2021 and December 31, 2020 (in thousands):

						Fair Value
		Fair Value Category				March 31, 2021				December 31, 2020
Assets:
Money market funds			Level 1			$	1,324			$	1,010
Short-term investments			Level 2				100,811				104,870
Mutual funds			Level 1				16,361				15,841

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, 2021 and December 31, 2020 (in thousands):

		March 31, 2021								December 31, 2020
		Carrying Amount				Fair Value				Carrying Amount				Fair Value
Liabilities:
2023 Notes			—				—				750,000				756,225
2027 Notes			1,000,000				1,066,000				1,000,000				1,070,000

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