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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified |
9 Months Ended | 9 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2013
Unit
Segment
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Sep. 30, 2012
Unit
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Sep. 30, 2013
Minimum
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Sep. 30, 2013
Maximum
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Sep. 30, 2013
Leasehold Improvements
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Sep. 30, 2013
Other Fixed Assets
Minimum
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Sep. 30, 2013
Other Fixed Assets
Maximum
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Sep. 30, 2013
Class A Common Stock
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Jun. 26, 2013
Class A Common Stock
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Sep. 30, 2013
Class B Common Stock
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Sep. 30, 2013
Slp
Class B Common Stock
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| Summary Of Significant Accounting Policies [Line Items] | |||||||||||
| Ownership percentage in a subsidiary | 46.00% | 43.00% | |||||||||
| Cash equivalents, maximum maturity period | 90 days | ||||||||||
| Equity method investments, unrealized intercompany profit(loss) not eliminated amount | $ 0 | ||||||||||
| Number of reporting unit | 1 | 1 | |||||||||
| Property, plant and equipment, useful life | 10 years | 3 years | 7 years | ||||||||
| Identifiable finite-lived intangible assets, useful life | 3 years | 20 years | |||||||||
| Common stock voting rights | 1 vote per share | 1 vote per share | |||||||||
| Class of share exchangeable to another class | One share of Class A common stock | One share of Class A common stock | |||||||||
| Number of operating segment | 1 | ||||||||||
| X | ||||||||||
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- Definition
Cash equivalent maximum maturity period. No definition available.
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| X | ||||||||||
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- Definition
Class of share exchangeable to another class. No definition available.
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| X | ||||||||||
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- Definition
Number of reportable units. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Description of voting rights of common stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This item represents the amount of unrealized intercompany profits and losses on transactions between the Entity and unconsolidated subsidiaries (including certain corporate joint ventures, and noncontrolled corporations), accounted for under the equity method of accounting, which have not been eliminated in preparing the Entity's financial statements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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| X | ||||||||||
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- Definition
The parent entity's interest in net assets of the subsidiary, expressed as a percentage. No definition available.
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| X | ||||||||||
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- Definition
Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. No definition available.
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| X | ||||||||||
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- Definition
Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. No definition available.
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