MAALP Condensed Consolidated Balance Sheets - Limited Partner [Member] - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets:
Land	$ 1,868,828	$ 1,836,417
Buildings, Improvements, and Other	11,636,424	11,281,504
Development and capital improvements in progress	53,739	116,833
Real Estate Investment Property, at Cost	13,558,991	13,234,754
Less accumulated depreciation	(2,439,418)	(2,075,071)
Real Estate Investment Property, Net	11,119,573	11,159,683
Undeveloped land	31,849	57,285
Investments in real estate joint ventures	44,619	44,956
Real estate assets, net	11,196,041	11,261,924
Cash and cash equivalents	46,139	10,750
Restricted Cash	33,261	78,117
Other assets	134,246	135,807
Real Estate Held-for-sale	9,300	5,321
Total assets	11,418,987	11,491,919
Liabilities:
Unsecured notes payable	3,582,624	3,525,765
Secured notes payable	921,399	976,292
Accrued expenses and other liabilities	473,803	405,560
Due to general partner	19	19
Total liabilities	4,977,845	4,907,636
Redeemable units	9,607	10,408
Capital [Abstract]
Preferred Units, Preferred Partners' Capital Accounts	66,840	66,840
General Partners' Capital Account	6,128,519	6,270,758
Limited Partners' Capital Account	221,841	231,676
Accumulated other comprehensive income (losses)	12,029	2,295
Capital	6,429,229	6,571,569
Noncontrolling Interest in Joint Ventures	2,306	2,306
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	6,431,535	6,573,875
Total Liabilities and Capital	$ 11,418,987	$ 11,491,919
Redeemable units, units issued and outstanding	95,899	103,504