Summary of Quarterly Financial Information (Unaudited) (Details) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017 USD ($) property $ / shares shares	Sep. 30, 2017 USD ($) property $ / shares shares	Jun. 30, 2017 USD ($) $ / shares shares	Mar. 31, 2017 USD ($) property $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Sep. 30, 2016 USD ($) $ / shares shares	Jun. 30, 2016 USD ($) $ / shares shares	Mar. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) property $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares
Interim Period, Costs Not Allocable [Line Items]
Revenue	$ 66,081	$ 62,678	$ 59,504	$ 61,999	$ 54,121	$ 43,855	$ 43,918	$ 48,045	$ 250,262	$ 189,939	$ 199,063
Net income (loss)	24,944	13,285	6,108	19,971	34,236	326	26,155	73,875	64,308	134,592	149,970
Net income attributable to noncontrolling interests	(4,032)	(418)	5,952	(4,340)	(14,415)	5,786	(8,237)	(44,950)	(2,838)	(61,816)	(84,262)
Net income attributable to Acadia	$ 20,912	$ 12,867	$ 12,060	$ 15,631	$ 19,821	$ 6,112	$ 17,918	$ 28,925	$ 61,470	$ 72,776	$ 65,708
Basic (in dollars per share) | $ / shares	$ 0.25	$ 0.15	$ 0.14	$ 0.18	$ 0.24	$ 0.08	$ 0.24	$ 0.40
Diluted (in dollars per share) | $ / shares	$ 0.25	$ 0.15	$ 0.14	$ 0.18	$ 0.24	$ 0.08	$ 0.24	$ 0.40
Weighted average number of shares: Basic | shares	83,733,000	83,700,000	83,662,000	83,635,000	82,728,000	78,449,000	72,896,000	70,756,000
Weighted average number of shares: Diluted | shares	83,733,000	83,700,000	83,662,000	83,646,000	82,728,000	78,624,000	72,896,000	71,215,000	83,685,471	76,243,550	68,869,639
Cash dividends declared per common share (in dollars per share) | $ / shares	$ 0.27	$ 0.26	$ 0.26	$ 0.26	$ 0.41	$ 0.25	$ 0.25	$ 0.25	$ 1.05	$ 1.16	$ 1.22
Impairment charges	$ 10,600	$ 3,800							$ 14,455	$ 0	$ 5,000
Gain on change in control and other	5,600								5,571	0	$ 1,596
Equity method investment, ownership percentage								65.00%
Noncontrolling Interests
Interim Period, Costs Not Allocable [Line Items]
Net income (loss)									$ 2,838	61,816
Impairment charges	7,600	2,700
Cortlandt Towne Center | Fund III
Interim Period, Costs Not Allocable [Line Items]
Gain/(Loss) on sale								$ 65,400
Cortlandt Towne Center | Fund III | Noncontrolling Interests
Interim Period, Costs Not Allocable [Line Items]
Gain/(Loss) on sale								$ 49,400
Heritage Shops | Fund III
Interim Period, Costs Not Allocable [Line Items]
Gain/(Loss) on sale							$ 16,600
Heritage Shops | Fund III | Noncontrolling Interests
Interim Period, Costs Not Allocable [Line Items]
Gain/(Loss) on sale							$ 12,500
Restatement Adjustment
Interim Period, Costs Not Allocable [Line Items]
Net income (loss)					$ (4,200)					(4,200)
Net income attributable to noncontrolling interests					$ 1,600					$ 1,600
Disposed of by sale
Interim Period, Costs Not Allocable [Line Items]
Gain (loss) on disposal	$ 35,900	$ 13,000	$ 3,300	$ 14,500
Number of retail properties | property	3	2		2					3
Disposed of by sale | Noncontrolling Interests
Interim Period, Costs Not Allocable [Line Items]
Gain (loss) on disposal	$ 26,700	$ 10,700
Disposed of by sale | Partnership Interest
Interim Period, Costs Not Allocable [Line Items]
Gain (loss) on disposal			$ 800	$ 2,700