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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
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Earnings Per Unit Disclosure |  |  |  |
Weighted average common units - basic |  | 79,361 | 79,188 | 53,075
Weighted Average Number Diluted Shares Outstanding Adjustment |  | 0 | 0 | 88
Weighted average common shares - diluted |  | 79,361 | 79,188 | 53,163
Calculation of Basic Earnings Per Unit [Member] |  |  |  |
Earnings Per Unit Disclosure |  |  |  |
Income from Continuing Operations, Including Portion Attributable to Noncontrolling Interest |  | $ 350,745 | $ 150,946 | $ 37,692
Income from continuing operations allocated to unvested restricted shares |  | 772 | 278 | 33
Income from continuing operations available for common unitholders, adjusted |  | 349,973 | 150,668 | 37,659
Income from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest |  | 0 | 5,331 | 69,852
Income from discontinued operations allocated to unvested restricted shares |  | 0 | (10) | (62)
Income from discontinued operations available for common unitholders, adjusted |  | $ 0 | $ 5,321 | $ 69,790
Earnings per unit - basic |  | $ 4.41 | $ 1.97 | $ 2.02
Calculation of Diluted Earnings Per Unit [Member] |  |  |  |
Earnings Per Unit Disclosure |  |  |  |
Income from Continuing Operations, Including Portion Attributable to Noncontrolling Interest |  | $ 350,745 | $ 150,946 | $ 37,692
Income from continuing operations allocated to unvested restricted shares |  | 772 | 278 | 0
Income from continuing operations available for common unitholders, adjusted |  | 349,973 | 150,668 | 37,692
Income from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest |  | 0 | 5,331 | 69,852
Income from discontinued operations allocated to unvested restricted shares |  | 0 | (10) | 0
Income from discontinued operations available for common unitholders, adjusted |  | $ 0 | $ 5,321 | $ 69,852
Diluted Earnings Per Unit |  | $ 4.41 | $ 1.97 | $ 2.02
Restricted Stock [Member] |  |  |  |
Earnings Per Unit Disclosure |  |  |  |
Effect of dilutive securities (units) | [1] | 100 |  |
[1] | 0.1 million potentially dilutive securities and their related income are not included in the diluted earnings per unit calculations as they are not dilutive.

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