Quarterly report pursuant to Section 13 or 15(d)

Equity - Summary of Unvested Shares of Restricted Common Stock (Detail)

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Equity - Summary of Unvested Shares of Restricted Common Stock (Detail) (Restricted Incentive [Member], USD $)
In Thousands, except Share data, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Restricted Incentive [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Beginning Balance, Restricted Shares of Common Stock 598,815
Granted, Restricted Shares of Common Stock 522,600
Vested, Restricted Shares of Common Stock (147,009)
Forfeited, Restricted Shares of Common Stock   
Ending Balance, Restricted Shares of Common Stock 974,406
Beginning Balance, Fair Value of Restricted Shares of Common Stock $ 7,484
Granted, Fair Value of Restricted Shares of Common Stock 7,410
Vested, Fair Value of Restricted Shares of Common Stock (1,838)
Forfeited, Fair Value of Restricted Shares of Common Stock   
Ending Balance, Fair Value of Restricted Shares of Common Stock $ 13,057