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Recent Accounting Standards - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | Mar. 31, 2015
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Unrecognized tax benefits | $ 2.7 us-gaap_UnrecognizedTaxBenefits
Netted against deferred tax assets |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Unrecognized tax benefits | $ 1.2 us-gaap_UnrecognizedTaxBenefits / mstr_SignificantChangeInUnrecognizedTaxBenefitsByItemAxis = mstr_UnrecognizedTaxBenefitsOtherMember

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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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