Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number

No definition available.

Name:	mso_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumber
Namespace Prefix:	mso_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	mso_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueRollForward
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Data Type:	xbrli:stringItemType
Balance Type:	na
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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period

+ References

No definition available.

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Weighted Average Grant Date Fair Value

+ References

No definition available.

+ Details

Name:	mso_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	mso_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
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Period Type:	duration

- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
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- Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward
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Period Type:	duration

- Definition

Number of non-vested options forfeited.

+ References

No definition available.

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average grant-date fair value of non-vested options forfeited.

+ References

No definition available.

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average grant-date fair value of non-vested options outstanding.

+ References

No definition available.

+ Details

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Data Type:	num:perShareItemType
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- Details

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- Details

Name:	us-gaap_AwardTypeAxis=mso_ServicePeriodBasedMember
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- Details

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Employee And Non-Employee Benefit And Compensation Plans (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Granted, weighted-average grant date fair value	$ 2.17
Service period-based options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Granted, weighted-average grant date fair value	$ 1.15	$ 1.79
Price-based options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Granted, weighted-average grant date fair value	$ 1.59
Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Nonvested outstanding, beginning balance				3,206,351
Nonvested outstanding, ending balance	963,543	1,541,095	2,683,116	3,206,351
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Nonvested outstanding, beginning balance, weighted-average grant date fair value				$ 1.89
Nonvested outstanding, ending balance, weighted-average grant date fair value	$ 1.13	$ 1.32	$ 1.79	$ 1.89
Stock Plan \| Service period-based options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Granted	25,070	1,190,000	505,000
Vested	(647,552)	(937,875)	(635,758)
Canceled and Forfeited	(40,070)	(725,000)	(392,477)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Granted, weighted-average grant date fair value	$ 1.99	$ 0.90	$ 1.72
Vested, weighted-average grant date fair value	$ 1.65	$ 1.73	$ 1.75
Canceled and Forfeited, weighted-average grant date fair value	$ 2.06	$ 1.71	$ 2.36
Stock Plan \| Price-based options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Granted	185,000
Canceled and Forfeited	(100,000)	(669,146)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Granted, weighted-average grant date fair value	$ 1.62
Canceled and Forfeited, weighted-average grant date fair value	$ 0.76	$ 1.82