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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

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