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Equity - Additional Information (Detail) (USD $)
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0 Months Ended | 0 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | |||||||
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Apr. 23, 2013
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Apr. 23, 2013
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Apr. 23, 2013
Performance Based Restricted Stock award [Member]
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Apr. 23, 2013
OP Units [Member]
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Jun. 30, 2014
Restricted Common Stock [Member]
2013 Plan [Member]
Employees and Directors [Member]
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Jun. 30, 2014
Restricted Common Stock [Member]
2013 Plan [Member]
Certain Employees [Member]
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Jun. 30, 2014
Restricted Incentive [Member]
2013 Plan [Member]
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Jun. 30, 2013
Restricted Incentive [Member]
2013 Plan [Member]
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Jun. 30, 2014
Restricted Incentive [Member]
2013 Plan [Member]
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Jun. 30, 2013
Restricted Incentive [Member]
2013 Plan [Member]
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Jun. 30, 2014
Restricted Incentive [Member]
2013 Plan [Member]
Date One [Member]
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Jun. 30, 2014
Restricted Incentive [Member]
2013 Plan [Member]
Date Two [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||
| Number of shares received by employees through reallocation | 202,826 | 128,348 | 135,938 | |||||||||
| Value per share under stock based compensation plan | $ 12.50 | |||||||||||
| Compensation expense | $ 5,800,000 | $ 5,800,000 | $ 5,800,000 | |||||||||
| Income tax benefit on reallocation | 0 | |||||||||||
| Shares awarded | 149,359 | 373,241 | ||||||||||
| Restricted common shares vesting years | Vest in 2015 and 2016 | |||||||||||
| Assumed forfeiture rate for calculation of compensation expense | 5.00% | |||||||||||
| Equity-based compensation expense | 1,500,000 | 6,200,000 | 2,000,000 | 6,200,000 | ||||||||
| Additional restricted stock awards authorized upon achievement of certain corporate and individual performance goals | 163,868 | |||||||||||
| Restricted common stock, vesting date | Dec. 31, 2015 | Dec. 31, 2016 | ||||||||||
| Unrecognized compensation expense | $ 11,900,000 | $ 11,900,000 | ||||||||||
| Weighted-average term in which unrecognized compensation expense is expected to be recognized | 2 years | |||||||||||