MAALP Consolidated Balance Sheets - Limited Partner [Member] - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Assets:
Land	$ 1,868,828,000	$ 1,836,417,000
Buildings, Improvements, and Other	11,670,216,000	11,281,504,000
Development and capital improvements in progress	59,506,000	116,833,000
Real estate investment property, at cost	13,598,550,000	13,234,754,000
Less accumulated depreciation	(2,549,287,000)	(2,075,071,000)
Real Estate Investment Property, Net	11,049,263,000	11,159,683,000
Undeveloped land	58,257,000	57,285,000
Investments in real estate joint ventures	44,181,000	44,956,000
Real estate assets, net	11,151,701,000	11,261,924,000
Cash and cash equivalents	34,259,000	10,750,000
Restricted Cash	17,414,000	78,117,000
Other assets	120,407,000	135,807,000
Real Estate Held-for-sale	0	5,321,000
Total assets	11,323,781,000	11,491,919,000
Liabilities:
Unsecured notes payable	4,053,302,000	3,525,765,000
Secured notes payable	475,026,000	976,292,000
Accrued expenses and other liabilities	413,850,000	405,560,000
Due to general partner	19,000	19,000
Total liabilities	4,942,197,000	4,907,636,000
Redeemable units	9,414,000	10,408,000
Capital [Abstract]
Preferred Stock, Liquidation Preference, Value	66,840,000	66,840,000
General Partner: 113,844,267 and 113,643,166 OP Units outstanding as of December 31, 2018 and December 31, 2017, respectively	6,083,142,000	6,270,758,000
Limited Partners: 4,111,301 and 4,191,586 OP Units outstanding as of December 31, 2018 and December 31, 2017, respectively	220,043,000	231,676,000
Accumulated other comprehensive (loss) income	(161,000)	2,295,000
Capital	6,369,864,000	6,571,569,000
Noncontrolling Interest in Joint Ventures	2,306,000	2,306,000
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	6,372,170,000	6,573,875,000
Liabilities and capital	$ 11,323,781,000	$ 11,491,919,000
Redeemable stock, shares/units issued and outstanding	98,371	103,504