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Stockholders' Equity - Class B Common Stock (Detail)
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7 Months Ended | 9 Months Ended | 11 Months Ended | 12 Months Ended | ||||||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Jul. 31, 2013
Class B Common Stock
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Sep. 30, 2013
Class B Common Stock
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Nov. 30, 2013
Class B Common Stock
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Dec. 31, 2013
Class B Common Stock
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Dec. 31, 2011
Class B Common Stock
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Dec. 31, 2010
Class B Common Stock
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Jun. 30, 2013
Employee Stock
Class B Common Stock
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| Class Of Stock [Line Items] | ||||||||||
| Balance, Shares | ||||||||||
| Common Stock, shares issued | 4,464,617 | 6,459,316 | ||||||||
| Stock issued subsequent to initial public offering | 16,540 | 17,000 | ||||||||
| Redemptions of partners’ interests, Shares | (14,092) | (14,000) | ||||||||
| Stock issued upon vesting of deferred equity units | 16,530 | 16,000 | ||||||||
| Conversion of Class B common stock to Class A common stock | (2,013,677) | 2,013,000 | ||||||||
| Balance, Shares | 4,464,617 |
| X | ||||||||||
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- Definition
Stock issued during period shares conversion of convertible shares. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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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| X | ||||||||||
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- Definition
Units contributed by each class of partners during the year. Units represent shares of ownership of the general, limited, and preferred partners. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The number of units redeemed during the year of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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