v2.4.1.9

Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Commitments and Contingencies [Line Items] |  |  |
Total rental expenses under operating lease agreements | $ 30.4us-gaap_OperatingLeasesRentExpenseNet | $ 28.3us-gaap_OperatingLeasesRentExpenseNet | $ 26.4us-gaap_OperatingLeasesRentExpenseNet
Northern Virginia Office Space |  |  |
Commitments and Contingencies [Line Items] |  |  |
Office space area leased under the agreement | 233,000us-gaap_AreaOfRealEstateProperty / us-gaap_LeaseArrangementTypeAxis = mstr_NorthernVirginiaOfficeSpaceMember |  |
Lease expiration date | 2020-12 |  |
Deferred rent included in other long-term liabilities | 18.9us-gaap_DeferredRentCreditNoncurrent / us-gaap_LeaseArrangementTypeAxis = mstr_NorthernVirginiaOfficeSpaceMember | 20.1us-gaap_DeferredRentCreditNoncurrent / us-gaap_LeaseArrangementTypeAxis = mstr_NorthernVirginiaOfficeSpaceMember |
Deferred rent included in current accrued expenses | $ 3.0us-gaap_DeferredRentCreditCurrent / us-gaap_LeaseArrangementTypeAxis = mstr_NorthernVirginiaOfficeSpaceMember | $ 2.8us-gaap_DeferredRentCreditCurrent / us-gaap_LeaseArrangementTypeAxis = mstr_NorthernVirginiaOfficeSpaceMember |
Northern Virginia Office, Additional Office Space | 2014 Restructuring Plan |  |  |
Commitments and Contingencies [Line Items] |  |  |
Lease expiration date | 2015-02 |  |
Office space ceased to be used | 19,000mstr_AreaOfRealEstatePropertyCeasedToBeUsed / us-gaap_LeaseArrangementTypeAxis = mstr_NorthernVirginiaOfficeAdditionalOfficeSpaceMember / us-gaap_RestructuringPlanAxis = mstr_TwentyFourteenRestructuringPlanMember |  |

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- Definition Area of Real Estate Property Ceased to be used + References No definition available. + Details
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- Details
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- Definition Date which lease or group of leases is set to expire, in YYYY-MM format. + References No definition available. + Details
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- Definition Area of a real estate property. + References No definition available. + Details
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Balance Type: | na
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- Definition For a classified balance sheet, the cumulative difference as of the balance sheet date between the payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense, by the lessor or lessee, respectively, within one year of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e39927-112707 + Details
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- Definition For a classified balance sheet, the cumulative difference between the rental income or payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense, by the lessor or lessee, respectively, more than one year after the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e39927-112707 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.26(c)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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- Details
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Balance Type: |
Period Type: |

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- Details
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