XML 56 R42.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Share Incentive and Other Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Unvested Restricted Shares and LTIP Units | A summary of the status of the Company’s unvested Restricted Shares and LTIP Units is presented below:
Unvested Restricted Shares and LTIP Units |  | Common Restricted Shares |  | Weighted Grant-Date Fair Value |  | LTIP Units |  | Weighted Grant-Date Fair Value
Unvested at January 1, 2014 |  | 63,737 |  |  | $ | 23.34 |  |  | 884,334 |  |  | $ | 21.62 |
Granted |  | 28,563 |  |  | 27.18 |  |  | 441,946 |  |  | 26.24 |
Vested |  | (34,598 | ) |  | 23.40 |  |  | (263,556 | ) |  | 20.23 |
Forfeited |  | (2,684 | ) |  | 23.54 |  |  | (800 | ) |  | 24.66 |
Unvested at December 31, 2014 |  | 55,018 |  |  | 25.90 |  |  | 1,061,924 |  |  | 23.92 |
Granted |  | 22,819 |  |  | 32.78 |  |  | 258,464 |  |  | 34.00 |
Vested |  | (24,744 | ) |  | 25.44 |  |  | (292,544 | ) |  | 22.82 |
Forfeited |  | (3,194 | ) |  | 26.25 |  |  | (7,723 | ) |  | 25.90 |
Unvested at December 31, 2015 |  | 49,899 |  |  | 25.90 |  |  | 1,020,121 |  |  | 23.92 |
Granted |  | 24,583 |  |  | 33.35 |  |  | 359,484 |  |  | 34.40 |
Vested |  | (24,886 | ) |  | 29.17 |  |  | (522,680 | ) |  | 26.08 |
Forfeited |  | (189 | ) |  | 35.37 |  |  | (48 | ) |  | 35.37 |
Unvested at December 31, 2016 |  | 49,407 |  |  | 27.92 |  |  | 856,877 |  |  | 26.99 |
Schedule of Share-based Compensation, Stock Options, Activity | A summary of option activity under all option arrangements is presented below (dollars in thousands except exercise prices):
Options |  | Shares |  | Weighted- Average Exercise Price |  | Weighted-Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value
Outstanding and exercisable at January 1, 2014 |  | 113,086 |  |  | $ | 19.28 |  |  | 3.5 |  |  | $ | 628 |
Granted |  | — |  |  | — |  |  | — |  |  | — |
Exercised |  | (57,739 | ) |  | 17.68 |  |  | — |  |  | 828 |
Forfeited or Expired |  | — |  |  | — |  |  | — |  |  | — |
Outstanding and exercisable at December 31, 2014 |  | 55,347 |  |  | $ | 20.93 |  |  | 1.1 |  |  | $ | 614 |
Granted |  | — |  |  | — |  |  | — |  |  | — |
Exercised |  | (49,098 | ) |  | 20.76 |  |  | — |  |  | 608 |
Forfeited or Expired |  | (3,000 | ) |  | 22.40 |  |  | — |  |  | — |
Outstanding and exercisable at December 31, 2015 |  | 3,249 |  |  | $ | 20.93 |  |  | 0.3 |  |  | 35 |
Granted |  | — |  |  | — |  |  | — |  |  | — |
Exercised |  | (3,000 | ) |  | 22.40 |  |  | — |  |  | — |
Forfeited or Expired |  | (249 | ) |  | 20.65 |  |  | — |  |  | — |
Outstanding and exercisable at December 31, 2016 |  | — |  |  | $ | — |  |  | — |  |  | $ | — |

X
- Definition Schedule of Unvested Restricted Shares and LTIP Units [Table Text Block] + References No definition available. + Details
Name: | akr_ScheduleOfUnvestedRestrictedSharesAndLtipUnitsTableTextBlock
Namespace Prefix: | akr_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration