Earnings Per OP Unit of MAALP (Details) - Limited Partner [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share, Basic [Abstract]
Dividends, Preferred Stock, Cash	$ 3,688	$ 3,688	$ 924
Weighted average common units - basic	117,777	117,617	82,661
Earnings per unit - basic	$ 1.93	$ 2.86	$ 2.70
Weighted Average Number Diluted Shares Outstanding Adjustment	198	280	298
Weighted average common shares - diluted	117,975	117,897	82,959
Diluted Earnings Per Unit	$ 1.93	$ 2.86	$ 2.70
Calculation of Basic Earnings Per Unit [Member]
Earnings Per Share, Basic [Abstract]
Income from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	$ 231,022	$ 340,536	$ 224,402
Income from continuing operations allocated to unvested restricted shares	291	535	574
Dividends, Preferred Stock, Cash	(3,688)	(3,688)	(307)
Income from continuing operations available for common unitholders, adjusted	$ 227,043	$ 336,313	$ 223,521
Earnings per unit - basic	$ 1.93	$ 2.86	$ 2.70
Calculation of Diluted Earnings Per Unit [Member]
Earnings Per Share, Basic [Abstract]
Income from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	$ 231,022	$ 340,536	$ 224,402
Dividends, Preferred Stock, Cash	(3,688)	(3,688)	(307)
Income from continuing operations available for common unitholders, adjusted	$ 227,334	$ 336,848	$ 224,095
Diluted Earnings Per Unit	$ 1.93	$ 2.86	$ 2.70