MAALP Condensed Consolidated Balance Sheets - Limited Partner [Member] - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets:
Land	$ 1,828,637	$ 1,816,008
Buildings and improvements	10,801,863	10,523,762
Furniture, fixtures and equipment	339,039	298,204
Development and capital improvements in progress	156,938	231,224
Real Estate Investment Property, at Cost	13,126,477	12,869,198
Less accumulated depreciation	(1,967,481)	(1,656,071)
Real Estate Investment Property, Net	11,158,996	11,213,127
Undeveloped land	57,285	71,464
Corporate properties, net	12,367	12,778
Investments in real estate joint ventures	45,096	44,493
Real Estate Held-for-sale	5,315	0
Real estate assets, net	11,279,059	11,341,862
Cash and cash equivalents	47,851	33,536
Restricted cash	80,253	88,264
Deferred financing costs, net	3,906	5,065
Other assets	120,493	134,525
Goodwill	1,239	1,239
Total assets	11,532,801	11,604,491
Liabilities:
Unsecured notes payable	3,382,861	3,180,624
Secured notes payable	1,109,973	1,319,088
Accounts payable	17,275	11,970
Fair market value of interest rate swaps	2,602	7,562
Accrued expenses and other liabilities	439,662	414,244
Security deposits	18,998	18,829
Due to general partner	19	19
Total liabilities	4,971,390	4,952,336
Redeemable units	10,804	10,073
Capital [Abstract]
Preferred Units, Preferred Partners' Capital Accounts	66,840	64,833
General Partners' Capital Account	6,249,190	6,337,721
Limited Partners' Capital Account	231,393	235,976
Accumulated other comprehensive loss	878	1,246
Noncontrolling Interest in Joint Ventures	2,306	2,306
Capital	6,548,301	6,639,776
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	6,550,607	6,642,082
Total Liabilities and Capital	$ 11,532,801	$ 11,604,491
Redeemable units, units issued and outstanding	101,081	103,578