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Benefit Plans - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Amortization related to restricted stock/Unit awards and LTIP Unit Awards | $ 1,689 | $ 3,101
Unrecognized compensation related to unvested restricted stock/Unit awards and LTIP Unit Awards | $ 13,873 |
Weighted average period of unrecognized compensation expected to be recognized | 1 year 50 days |
Severance Costs | $ 1,298 |
Management | Restricted Stock/Unit Awards |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Restricted stock/Unit awards and LTIP Unit Awards issued | 208,890 |
Fair value of restricted stock/Unit awards and LTIP Unit Awards issued | $ 5,981 |
Vesting period of restricted stock/Unit awards issued | 3 years |
Compensation expense recognized at date of grant |  | $ 1,590
Management | LTIP Unit Awards |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Restricted stock/Unit awards and LTIP Unit Awards issued | 179,288 |
Fair value of restricted stock/Unit awards and LTIP Unit Awards issued | $ 2,381 |
Vesting period of restricted stock/Unit awards issued | 3 years |

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