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Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Amortization related to restricted stock/Unit awards and LTIP Unit Awards | $ 1,428 | $ 1,507 | $ 5,898 | $ 5,574
Unrecognized compensation related to unvested restricted stock/Unit awards and LTIP Unit Awards | 8,231 |  | $ 8,231 |
Weighted average period of unrecognized compensation expected to be recognized |  |  | 350 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 Awards |  |  |  |
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 |  | $ 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 |  | $ 2,561 |
Director | Restricted Stock/Unit Awards |  |  |  |
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 |  | $ 350 |
Vesting period of restricted stock/Unit awards issued |  |  | 1 year |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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