CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues
Rental income	$ 198,941	$ 152,814	$ 158,632
Expense reimbursements	44,907	32,282	36,306
Other	6,414	4,843	4,125
Total revenues	250,262	189,939	199,063
Operating expenses
Depreciation and amortization	104,934	70,011	60,751
General and administrative	33,756	40,648	30,368
Real estate taxes	35,946	25,630	25,384
Property operating	41,668	24,244	28,423
Other operating	2,184	7,517	4,675
Impairment charges	14,455	0	5,000
Total operating expenses	232,943	168,050	154,601
Operating income	17,319	21,889	44,462
Equity in earnings and gains of unconsolidated affiliates inclusive of gains on disposition of properties of $15,336, $35,950 and $24,043, respectively	23,371	39,449	37,330
Interest income	29,143	25,829	16,603
Interest expense	(58,978)	(34,645)	(37,297)
Gain on change in control and other	5,571	0	1,596
Income from continuing operations before income taxes	16,426	52,522	62,694
Income tax (provision) benefit	(1,004)	105	(1,787)
Income from continuing operations before gain on disposition of properties	15,422	52,627	60,907
Gain on disposition of properties, net of tax	48,886	81,965	89,063
Net income	64,308	134,592	149,970
Net income attributable to noncontrolling interests	(2,838)	(61,816)	(84,262)
Net income attributable to Acadia	$ 61,470	$ 72,776	$ 65,708
Earnings Per Share, Basic and Diluted [Abstract]
Basic and diluted earnings per share (in dollars per share)	$ 0.73	$ 0.94	$ 0.94