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Stockholders' Equity - Summary of Authorized and Outstanding Equity (Parenthetical) (Detail) (USD $)
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6 Months Ended |
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Jun. 30, 2013
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| Schedule Of Stockholders Equity [Line Items] | |
| Preferred stock, par value | $ 0.01 |
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Class A Common Stock [Member]
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| Schedule Of Stockholders Equity [Line Items] | |
| Common stock, par value | $ 0.01 |
| Common stock voting rights | 1 vote per share |
| Common stockholders rights percentage | 100.00% |
| Common stock, shares outstanding | 4,790,694 |
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Class B Common Stock [Member]
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| Schedule Of Stockholders Equity [Line Items] | |
| Common stock, par value | $ 0.01 |
| Common stock voting rights | 1 vote per share |
| Class of share exchangeable to another class | One share of Class A common stock |
| Common stock, shares outstanding | 6,459,316 |
| Deferred equity units exercisable | 191,828 |
| X | ||||||||||
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- Definition
Class of share exchangeable to another class. No definition available.
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- Definition
Common stock holding rights percentage. No definition available.
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- Definition
Exercisable deferred equity units. No definition available.
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- Details
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- Definition
Face amount or stated value per share of common stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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- Definition
Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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