MORTGAGES AND OTHER NOTES PAYABLE Secured Credit Facilities (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Line of Credit Facility [Line Items]
Total amount of credit facility	$ 300,000
Amount borrowed	68,750	93,050
Net borrowings (repayments) during the year ended December 31, 2013	(24,300)
Letters of credit outstanding as of December 31, 2013	12,500
Amount available under credit facilities as of December 31, 2013	218,750
Acadia Realty, LP [Member]
Line of Credit Facility [Line Items]
Total amount of credit facility	150,000
Amount borrowed	0	0
Net borrowings (repayments) during the year ended December 31, 2013	0
Letters of credit outstanding as of December 31, 2013	12,500
Amount available under credit facilities as of December 31, 2013	137,500
Fund IV [Member]
Line of Credit Facility [Line Items]
Total amount of credit facility	150,000
Amount borrowed	68,750	93,050
Net borrowings (repayments) during the year ended December 31, 2013	(24,300)
Letters of credit outstanding as of December 31, 2013	0
Amount available under credit facilities as of December 31, 2013	$ 81,250