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Earnings Per OP Unit of MAALP Earnings Per OP Unit of MAALP (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Limited Partner [Member] |  |
Earnings Per Share Disclosure [Line Items] |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | $ 65,958 | $ 50,820
Dividends, Preferred Stock, Cash | $ 922 | $ 922
Weighted average common units - basic | 117,837 | 117,689
Earnings per unit - basic | $ 0.55 | $ 0.42
Effect of dilutive securities | 207 | 0
Weighted average common shares - diluted | 118,044 | 117,689
Earnings per unit - diluted | $ 0.55 | $ 0.42
Limited Partner [Member] | Calculation of Basic Earnings Per Unit [Member] |  |
Earnings Per Share Disclosure [Line Items] |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | $ 65,958 | $ 50,820
Income from continuing operations allocated to unvested restricted shares | (87) | (79)
Dividends, Preferred Stock, Cash | (922) | (922)
Income from continuing operations available for common unitholders, adjusted | $ 64,949 | $ 49,819
Earnings per unit - basic | $ 0.55 | $ 0.42
Limited Partner [Member] | Calculation of Diluted Earnings Per Unit [Member] |  |
Earnings Per Share Disclosure [Line Items] |  |
Income from Continuing Operations, Including Portion Attributable to Noncontrolling Interest | $ 65,958 | $ 50,820
Income from continuing operations allocated to unvested restricted shares | 0 | (79)
Dividends, Preferred Stock, Cash | (922) | (922)
Income from continuing operations available for common unitholders, adjusted | $ 65,036 | $ 49,819
Earnings per unit - diluted | $ 0.55 | $ 0.42
Parent Company [Member] |  |
Earnings Per Share Disclosure [Line Items] |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | $ 65,958 | $ 50,820
Dividends, Preferred Stock, Cash | $ 922 | $ 922
Effect of dilutive securities | 207 | 0
Weighted average common shares - diluted | 113,933 | 113,507
Restricted Stock [Member] | Parent Company [Member] |  |
Earnings Per Share Disclosure [Line Items] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  | 200

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