Summary of Revenues and Pre-Tax Loss Generated by Angel Dot Com Business In Addition to Pre-Tax Gain on Sale Recorded (Detail) (Angel. Com, USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Angel. Com
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Angel.com revenues	$ 0	$ 6,514	$ 6,320	$ 13,265
Angel.com pre-tax loss	0	989	986	2,191
MicroStrategy pre-tax (loss) gain on sale	$ 0	$ 0	$ 94,925	$ 0

Amount of gain (loss), before tax expense or benefit and not previously recognized, resulting from the sale of a business component.

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

-Publisher FASB

-Name Accounting Standards Codification

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Amount of operating income or loss attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.

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