| Stockholder's Equity - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified | 9 Months Ended | 1 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
| Sep. 30, 2013
 Dividend Paid [Member] | Sep. 30, 2012
 Dividend Paid [Member] | Sep. 30, 2013
 Dividend Declared [Member] | Sep. 30, 2012
 Dividend Declared [Member] | Oct. 31, 2013
 Subsequent Event [Member]
 Dividend Paid [Member] | Sep. 30, 2013
 Series A Redeemable Preferred Stock [Member] | Dec. 31, 2012
 Series A Redeemable Preferred Stock [Member] | Sep. 30, 2013
 Preferred Stock [Member] | |
| Preferred stock, shares issued | 1,000 | 1,000 | ||||||
| Preferred stock, shares outstanding | 1,000 | 1,000 | ||||||
| Preferred stock, authorized shares | 25,000 | |||||||
| Preferred stock, par value | $ 0.0001 | |||||||
| Preferred stock dividend per share | $ 10 | |||||||
| Preferred stock dividends | $ 31,181 | $ 15,654 | $ 6,500 | $ 0 | $ 6,500 | |||
| Preferred stock liquidation preference per share | $ 10 | |||||||
| Preferred stock redemption per share | $ 10 | |||||||
| X | ||||||||||
| 
- Definition Amount of dividend return for each outstanding share of Series A preferred stock. No definition available. 
 | 
| X | ||||||||||
| 
- Definition Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). Reference 1: http://www.xbrl.org/2003/role/presentationRef 
 | 
| X | ||||||||||
| 
- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
 | 
| X | ||||||||||
| 
- 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 
 | 
| X | ||||||||||
| 
- Definition The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
 | 
| X | ||||||||||
| 
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
 | 
| X | ||||||||||
| 
- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
 | 
| X | ||||||||||
| 
- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
 |