MAALP Consolidated Balance Sheets - Limited Partner [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets:
Land	$ 1,836,417	$ 1,816,008
Buildings, Improvements, and Other	11,281,504	10,853,474
Development and capital improvements in progress	116,833	231,224
Real estate investment property, at cost	13,234,754	12,900,706
Less accumulated depreciation	(2,075,071)	(1,674,801)
Real Estate Investment Property, Net	11,159,683	11,225,905
Undeveloped land	57,285	71,464
Investments in real estate joint ventures	44,956	44,493
Real estate assets, net	11,261,924	11,341,862
Cash and cash equivalents	10,750	33,536
Restricted cash	78,117	88,264
Other assets	135,807	140,829
Real Estate Held-for-sale	5,321	0
Total assets	11,491,919	11,604,491
Liabilities:
Secured notes payable	976,292	1,319,088
Unsecured notes payable	3,525,765	3,180,624
Accrued expenses and other liabilities	405,560	452,605
Due to general partner	19	19
Total liabilities	4,907,636	4,952,336
Redeemable units	10,408	10,073
Capital [Abstract]
General Partner: 75,267,675 OP Units outstanding at December 31, 2014 and 74,830,726 OP Units outstanding at December 31, 2013	6,270,758	6,337,721
Limited Partners: 4,191,152 OP Units outstanding at December 31, 2014 and 4,227,384 OP Units outstanding at December 31, 2013	231,676	235,976
Preferred Stock, Liquidation Preference, Value	66,840	64,833
Accumulated other comprehensive (loss) income	2,295	1,246
Capital	6,571,569	6,639,776
Noncontrolling Interest in Joint Ventures	2,306	2,306
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	6,573,875	6,642,082
Liabilities and capital	$ 11,491,919	$ 11,604,491
Redeemable stock, shares/units issued and outstanding	103,504	103,578