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Companys Deferred Tax Assets Net of Deferred Tax Liabilities and Valuation Allowance (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule of Deferred Income Tax Assets and Liabilities
Deferred tax assets, net of deferred tax liabilities	$ 14,707mstr_DeferredTaxAssetsLiabilitiesGross	$ 19,321mstr_DeferredTaxAssetsLiabilitiesGross
Valuation allowance	(2,332)us-gaap_DeferredTaxAssetsValuationAllowance	(2,311)us-gaap_DeferredTaxAssetsValuationAllowance
Deferred tax assets, net of deferred tax liabilities and valuation allowance	$ 12,375us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 17,010us-gaap_DeferredTaxAssetsLiabilitiesNet

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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X

- Definition

Amount after 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

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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- 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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