MAALP Condensed Consolidated Balance Sheets - Limited Partner [Member] - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets:
Land	$ 1,878,209	$ 1,868,828
Buildings, Improvements, and Other	11,730,705	11,670,216
Development and capital improvements in progress	57,396	59,506
Real Estate Investment Property, at Cost	13,666,310	13,598,550
Less accumulated depreciation	(2,668,708)	(2,549,287)
Real Estate Investment Property, Net	10,997,602	11,049,263
Undeveloped land	58,257	58,257
Investments in real estate joint ventures	44,138	44,181
Real estate assets, net	11,099,997	11,151,701
Cash and cash equivalents	44,623	34,259
Restricted Cash	14,764	17,414
Other assets	144,378	120,407
Total assets	11,303,762	11,323,781
Liabilities:
Unsecured notes payable	3,886,236	4,053,302
Secured notes payable	661,862	475,026
Accrued expenses and other liabilities	419,320	413,850
Due to general partner	19	19
Total liabilities	4,967,437	4,942,197
Redeemable units	11,045	9,414
Capital [Abstract]
Preferred Units, Preferred Partners' Capital Accounts	66,840	66,840
General Partners' Capital Account	6,038,625	6,083,142
Limited Partners' Capital Account	218,011	220,043
Accumulated other comprehensive income (losses)	(3,362)	(161)
Capital	6,320,114	6,369,864
Noncontrolling Interest in Joint Ventures	5,166	2,306
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	6,325,280	6,372,170
Total Liabilities and Capital	$ 11,303,762	$ 11,323,781
Redeemable units, units issued and outstanding	101,025	98,371