MAALP Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Noncontrolling Interest in Joint Ventures	$ 2,300
Limited Partner [Member]
Noncontrolling Interest in Joint Ventures	2,306	$ 0
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	6,642,082	3,157,804
Assets:
Land	1,816,008	926,532
Buildings and improvements	10,523,762	6,939,288
Furniture, fixtures and equipment	298,204	228,157
Development and capital improvements in progress	231,224	44,355
Real estate investment property, at cost	12,869,198	8,138,332
Less accumulated depreciation	(1,656,071)	(1,482,368)
Real Estate Investment Property, Net	11,213,127	6,655,964
Undeveloped land	71,464	51,779
Corporate properties, net	12,778	8,812
Investments in real estate joint ventures	44,493	1,811
Real estate assets, net	11,341,862	6,718,366
Cash and cash equivalents	33,536	37,559
Restricted cash	88,264	26,082
Deferred financing costs, net	5,065	5,232
Other assets	134,525	58,935
Goodwill	1,239	1,607
Total assets	11,604,491	6,847,781
Liabilities:
Secured notes payable	1,319,088	1,286,236
Unsecured notes payable	3,180,624	2,141,332
Accounts payable	11,970	5,922
Fair market value of interest rate swaps	7,562	10,358
Accrued expenses and other liabilities	414,244	226,237
Security deposits	18,829	11,623
Due to general partner	19	19
Total liabilities	4,952,336	3,681,727
Redeemable units	10,073	8,250
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	6,337,721	2,993,696
Limited Partners: 4,191,152 OP Units outstanding at December 31, 2014 and 4,227,384 OP Units outstanding at December 31, 2013	235,976	165,726
Preferred Stock, Liquidation Preference, Value	64,833	0
Accumulated other comprehensive (loss) income	1,246	(1,618)
Capital	6,639,776	3,157,804
Liabilities and capital	$ 11,604,491	$ 6,847,781
Redeemable stock, shares/units issued and outstanding	103,578	90,844