XML 23 R5.htm IDEA: XBRL DOCUMENT
v3.8.0.1

CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Statement [Abstract] |  |  |
Gains (losses) on disposition of properties | $ 15,336 | $ 35,950 | $ 24,043

X
- Definition Gain (Loss) On Disposition Of Property Of Equity Method Investment + References No definition available. + Details
Name: | akr_GainLossOnDispositionOfPropertyOfEquityMethodInvestment
Namespace Prefix: | akr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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