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Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Amortization related to restricted stock/Unit awards and LTIP Unit Awards | $ 1,507 | $ 1,506 | $ 4,470 | $ 4,067
Unrecognized compensation related to unvested restricted stock/Unit awards and LTIP Unit Awards | $ 9,919 |  | $ 9,919 |
Weighted average period of unrecognized compensation expected to be recognized |  |  | 1 year 20 days |
LTIP Unit Awards | Minimum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting percentage of LTIP Unit Awards |  |  | 0.00% |
LTIP Unit Awards | Maximum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting percentage of LTIP Unit Awards |  |  | 100.00% |
Management | Restricted Stock/Unit |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Restricted stock/Unit awards and LTIP Unit Awards issued |  |  | 308,373 |
Fair value of restricted stock/Unit awards and LTIP Unit Awards issued |  |  | $ 6,047 |
Vesting Period of restricted stock/Unit awards issued |  |  | 3 years |
Compensation expense recognized at date of grant |  |  | $ 1,590 | $ 1,250
Management | LTIP Unit Awards |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Restricted stock/Unit awards and LTIP Unit Awards issued |  |  | 254,524 |
Fair value of restricted stock/Unit awards and LTIP Unit Awards issued |  |  | $ 2,561 |
Director | Restricted Stock/Unit |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Restricted stock/Unit awards and LTIP Unit Awards issued |  |  | 14,460 |
Fair value of restricted stock/Unit awards and LTIP Unit Awards issued |  |  | $ 350 |
Vesting Period of restricted stock/Unit awards issued |  |  | 1 year |

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