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Partners' Capital of MAALP - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019 | Jun. 28, 2019
Schedule Of Capital Structure [Line Items] |  |  |  |
Operating partnership units outstanding | 118,423,860 | 118,133,172 |  |
General Partners' Capital Account, Units Outstanding | 114,365,203 | 114,043,089 |  |
Limited Partners' Capital Account, Units Outstanding | 4,058,657 | 4,090,083 |  |
Preferred Stock, Shares Outstanding | 867,846 |  | 867,846 |
Redeemable Preferred Stock [Member] |  |  |  |
Schedule Of Capital Structure [Line Items] |  |  |  |
Preferred Stock, Shares Outstanding | 867,846 |  |  |
Noncontrolling Interest |  |  |  |
Schedule Of Capital Structure [Line Items] |  |  |  |
Common Shares Issuable Upon Conversion Of Convertible Stock | 4,058,657 | 4,090,083 |  |
Limited Partners' Capital Account | $ 465.4 | $ 481.6 |  |
Redeemable Capital Shares Par Or Stated Value Per Share | $ 114.67 |  |  | $ 117.76
M A A L P |  |  |  |
Schedule Of Capital Structure [Line Items] |  |  |  |
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest | 96.60% | 96.50% |  |

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