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Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares available under the Plan | 3,000,000 |  |
Restricted stock/Unit awards and LTIP Unit Awards | 498,792 |  |
Unrecognized compensation related to unvested restricted stock/Unit awards and LTIP Unit Awards | $ 5,432 |  |
Amortization related to restricted stock/Unit awards and LTIP Unit Awards | 7,177 | $ 7,605 | $ 6,202
Amortization capitalized in connection with development activities | $ 42 | 41 | 43
Weighted average period of unrecognized compensation expected to be recognized | 10 months 29 days |  |
Matching contributions in 401(k) / profit sharing plan | $ 471 | $ 387 | $ 300
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% |  |
Director | Restricted Stock/Unit |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Restricted stock/Unit awards and LTIP Unit Awards | 17,385 | 19,250 |
Unrecognized compensation related to unvested restricted stock/Unit awards and LTIP Unit Awards | $ 350 | $ 350 |
Vesting period of restricted stock/Unit awards | 1 year |  |
Management | Restricted Stock/Unit |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Restricted stock/Unit awards and LTIP Unit Awards | 216,975 | 299,805 | 284,461
Unrecognized compensation related to unvested restricted stock/Unit awards and LTIP Unit Awards | $ 4,708 | $ 5,413 | $ 4,719
Vesting period of restricted stock/Unit awards | 3 years |  |
Compensation expense recognized at date of grant | $ 1,352 | $ 1,451 | $ 1,008
Management | LTIP Unit Awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Restricted stock/Unit awards and LTIP Unit Awards | 264,432 |  | 718,960
Unrecognized compensation related to unvested restricted stock/Unit awards and LTIP Unit Awards | $ 2,531 |  | $ 5,411

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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 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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