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	12 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
STATEMENTS OF INCOME
Gain on disposition of properties		$ 33	$ 2,014	$ 33
Disposal Group, Not Discontinued Operations
STATEMENTS OF INCOME
Revenues	$ 10	772	53	1,564
Expenses	(180)	(947)	(257)	(1,691)
Gain on disposition of properties		33	2,014	33	$ 5,140
Net (income) loss attributable to noncontrolling interests	9	496	154	395
Net income attributable to Acadia	$ (161)	$ 354	$ 1,964	$ 301

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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