Real Estate - Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
STATEMENTS OF INCOME
Gain on disposition of properties	$ 5,909	$ 485	$ 10,521	$ 485
Disposal Group, Not Discontinued Operations
STATEMENTS OF INCOME
Revenues	1,557	2,631	3,570	5,468
Expenses	1,979	2,513	3,863	5,397
Gain on disposition of properties	5,909	485	10,521	485
Net income attributable to noncontrolling interests	4,218	395	4,320	307
Net income attributable to Acadia	$ 1,269	$ 208	$ 5,908	$ 249

Amount after tax of income (loss) from a discontinued operation attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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- Definition

Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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