MAALP Capital (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Increase (Decrease) in Partners' Capital [Roll Forward]
Dividends, Preferred Stock, Cash		$ 0
General Partners' Capital Account [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Units Issued During Period, Value, Unit Options Exercised	$ 218
Total Partnership Capital [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Units Issued During Period, Value, Unit Options Exercised	218
Limited Partner [Member]
Capital Disclosure [Line Items]
Noncontrolling Interest in Joint Ventures	2,306		$ 2,306
Increase (Decrease) in Partners' Capital [Roll Forward]
Dividends, Preferred Stock, Cash	1,844	0
Limited Partner [Member] | General Partners' Capital Account [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning Balance	6,337,721	2,993,696	2,993,696
Net Income Allocated to General Partners	88,376	88,557
Issuance of units	16	186
Units repurchased and retired	(4,782)	(1,742)
General partner units issued in exchange for limited partner units	265	158
Units issued in exchange for redeemable units	1,482	123
Redeemable stock fair market value	(719)	(1,518)
Adjustment for noncontrolling interest ownership in operating partnership	139	54
Amortization of unearned compensation	5,625	4,383
Distributions	(197,680)	(123,852)
Ending Balance	6,230,661	2,960,045	6,337,721
Limited Partner [Member] | Total Partnership Capital [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning Balance	6,642,082	3,157,804	3,157,804
Net Income Available for Common Unitholders	93,571	93,438
Other comprehensive (loss) income - derivatives insturments (cash flow hedges)	(425)	(2,702)
Issuance of units	2,023	186
Units repurchased and retired	(4,782)	(1,742)
General partner units issued in exchange for limited partner units	0	0
Units issued in exchange for redeemable units	1,482	123
Redeemable stock fair market value	(719)	(1,518)
Adjustment for noncontrolling interest ownership in operating partnership	0	0
Amortization of unearned compensation	5,625	4,383
Distributions	(205,008)	(130,672)
Dividends, Preferred Stock, Cash	1,844
Ending Balance	6,532,223	3,119,300	6,642,082
Limited Partner [Member] | Limited Partner [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning Balance	235,976	165,726	165,726
Net Income Allocated to Limited Partners	3,351	4,881
General partner units issued in exchange for limited partner units	(265)	(158)
Adjustment for noncontrolling interest ownership in operating partnership	(139)	(54)
Distributions	(7,328)	(6,820)
Ending Balance	231,595	163,575	235,976
Limited Partner [Member] | AOCI Attributable to Noncontrolling Interest [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning Balance	1,246	(1,618)	(1,618)
Other comprehensive (loss) income - derivatives insturments (cash flow hedges)	(425)	(2,702)
Ending Balance	821	(4,320)	1,246
Accumulated Distributions in Excess of Net Income [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Redeemable stock fair market value		$ (1,518)
Accumulated Distributions in Excess of Net Income [Member] | Limited Partner [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of units	2,007		$ 64,833
Dividends, Preferred Stock, Cash	1,844
Preferred Stock Including Additional Paid in Capital [Member] | Limited Partner [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Ending Balance	$ 66,840