v2.4.1.9

Property and Equipment - Additional Information (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment, net | $ 77,852,000us-gaap_PropertyPlantAndEquipmentNet | $ 85,445,000us-gaap_PropertyPlantAndEquipmentNet |
Accumulated depreciation | 93,041,000us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | 79,341,000us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment |
Property and equipment, gross | 170,893,000us-gaap_PropertyPlantAndEquipmentGross | 164,786,000us-gaap_PropertyPlantAndEquipmentGross |
Depreciation and amortization | 20,100,000us-gaap_DepreciationAndAmortization | 21,000,000us-gaap_DepreciationAndAmortization | 17,700,000us-gaap_DepreciationAndAmortization
Aircraft And Aircraft-Related Equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment, net | 41,500,000us-gaap_PropertyPlantAndEquipmentNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = mstr_AircraftAndAircraftRelatedEquipmentMember | 43,000,000us-gaap_PropertyPlantAndEquipmentNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = mstr_AircraftAndAircraftRelatedEquipmentMember |
Accumulated depreciation | 7,100,000us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = mstr_AircraftAndAircraftRelatedEquipmentMember | 5,600,000us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = mstr_AircraftAndAircraftRelatedEquipmentMember |
Computer Equipment And Purchased Software |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment, gross | 72,602,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = mstr_ComputerEquipmentAndPurchasedSoftwareMember | 66,713,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = mstr_ComputerEquipmentAndPurchasedSoftwareMember |
Computer Equipment And Purchased Software | Assets Held under Capital Leases |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Accumulated depreciation | 2,500,000us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_MajorPropertyClassAxis = us-gaap_AssetsHeldUnderCapitalLeasesMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = mstr_ComputerEquipmentAndPurchasedSoftwareMember | 1,700,000us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_MajorPropertyClassAxis = us-gaap_AssetsHeldUnderCapitalLeasesMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = mstr_ComputerEquipmentAndPurchasedSoftwareMember |
Property and equipment, gross | $ 2,900,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_MajorPropertyClassAxis = us-gaap_AssetsHeldUnderCapitalLeasesMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = mstr_ComputerEquipmentAndPurchasedSoftwareMember | $ 2,900,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_MajorPropertyClassAxis = us-gaap_AssetsHeldUnderCapitalLeasesMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = mstr_ComputerEquipmentAndPurchasedSoftwareMember |

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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 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 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 14 -Article 5 + Details
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- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 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 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 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 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 7 + Details
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