MAALP Condensed Consolidated Balance Sheets - Limited Partner [Member] - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Assets:
Land	$ 1,821,016	$ 1,816,008
Buildings and improvements	10,641,003	10,523,762
Furniture, fixtures and equipment	323,155	298,204
Development and capital improvements in progress	258,047	231,224
Real Estate Investment Property, at Cost	13,043,221	12,869,198
Less accumulated depreciation	(1,851,913)	(1,656,071)
Real Estate Investment Property, Net	11,191,308	11,213,127
Undeveloped land	64,790	71,464
Corporate properties, net	12,072	12,778
Investments in real estate joint ventures	44,839	44,493
Real Estate Held-for-sale	31,366	0
Real estate assets, net	11,344,375	11,341,862
Cash and cash equivalents	39,659	33,536
Restricted cash	27,859	88,264
Deferred financing costs, net	4,292	5,065
Other assets	116,705	134,525
Goodwill	1,239	1,239
Total assets	11,534,129	11,604,491
Liabilities:
Unsecured notes payable	3,443,056	3,180,624
Secured notes payable	1,129,996	1,319,088
Accounts payable	13,932	11,970
Fair market value of interest rate swaps	3,626	7,562
Accrued expenses and other liabilities	381,232	414,244
Security deposits	19,637	18,829
Due to general partner	19	19
Total liabilities	4,991,498	4,952,336
Redeemable units	10,408	10,073
Capital [Abstract]
Preferred Units, Preferred Partners' Capital Accounts	66,840	64,833
General Partners' Capital Account	6,230,661	6,337,721
Limited Partners' Capital Account	231,595	235,976
Accumulated other comprehensive loss	821	1,246
Noncontrolling Interest in Joint Ventures	2,306	2,306
Capital	6,529,917	6,639,776
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	6,532,223	6,642,082
Total Liabilities and Capital	$ 11,534,129	$ 11,604,491
Redeemable units, units issued and outstanding	98,771	103,578