Quarterly report pursuant to Section 13 or 15(d)

Stockholder's Equity - Additional Information (Detail)

v2.4.0.8
Stockholder's Equity - Additional Information (Detail) (USD $)
 1 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended
Apr. 23, 2013
Sep. 30, 2013
Y
Sep. 30, 2013
Y
Sep. 30, 2013
Y
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum equity-based awards as a percentage of common stock issued and outstanding       7.50%
Number of shares received by employee through reallocation 202,826      
Value per share under stock based compensation plan $ 12.50      
Compensation expense $ 5,800,000      
Number of restricted common stock granted 606,415      
Grant-date fair value of restricted common stock 12.50      
Restricted common stock vesting period 4 years      
Restricted Incentive [Member]
        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Assumed forfeiture rate for calculation of compensation expense 5.00%      
Equity-based compensation expense   400,000 6,600,000  
Unrecognized compensation expense   6,400,000 6,400,000 6,400,000
Weighted-average term in which unrecognized compensation expense is expected to be recognized   2 2 2
Total fair value of shares vested       $ 0
Restricted Stock Units [Member]
        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares received by employee through reallocation 128,348      
OP Units [Member]
        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares received by employee through reallocation 135,938