MAALP Condensed Consolidated Balance Sheets - Limited Partner [Member] - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Assets:
Land	$ 1,868,828	$ 1,836,417
Buildings, Improvements, and Other	11,555,677	11,281,504
Development and capital improvements in progress	68,784	116,833
Real Estate Investment Property, at Cost	13,493,289	13,234,754
Less accumulated depreciation	(2,316,195)	(2,075,071)
Real Estate Investment Property, Net	11,177,094	11,159,683
Undeveloped land	41,149	57,285
Investments in real estate joint ventures	44,770	44,956
Real estate assets, net	11,263,013	11,261,924
Cash and cash equivalents	32,610	10,750
Restricted Cash	28,193	78,117
Other assets	122,563	135,807
Real Estate Held-for-sale	750	5,321
Total assets	11,447,129	11,491,919
Liabilities:
Unsecured notes payable	3,621,824	3,525,765
Secured notes payable	926,811	976,292
Accrued expenses and other liabilities	409,604	405,560
Due to general partner	19	19
Total liabilities	4,958,258	4,907,636
Redeemable units	9,410	10,408
Capital [Abstract]
Preferred Units, Preferred Partners' Capital Accounts	66,840	66,840
General Partners' Capital Account	6,177,170	6,270,758
Limited Partners' Capital Account	224,813	231,676
Accumulated other comprehensive income (losses)	8,332	2,295
Capital	6,477,155	6,571,569
Noncontrolling Interest in Joint Ventures	2,306	2,306
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	6,479,461	6,573,875
Total Liabilities and Capital	$ 11,447,129	$ 11,491,919
Redeemable units, units issued and outstanding	93,475	103,504