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Companys Deferred Tax Assets Net of Deferred Tax Liabilities and Valuation Allowance (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule of Deferred Income Tax Assets and Liabilities
Deferred tax assets, net of deferred tax liabilities	$ 8,518	$ 19,321
Valuation allowance	(2,096)	(2,311)
Deferred tax assets, net of deferred tax liabilities and valuation allowance	$ 6,422	$ 17,010

X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences.

+ References

No definition available.

+ Details

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Balance Type:	debit
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X

- Definition

Schedule of Deferred Income Tax Assets and Liabilities [Line Items]

+ References

No definition available.

+ Details

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Namespace Prefix:	mstr_
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X

- Definition

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, before jurisdictional netting.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 740



-SubTopic 10



-Section 50



-Paragraph 2



-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

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X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 740



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (c)



-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

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