XML 47 R37.htm IDEA: XBRL DOCUMENT
v3.20.2

Financing Arrangement (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2020
Co-Venture Arrangement [Abstract] |
Financing arrangement activity | During the three and nine months ended September 30, 2020 and 2019, the Company incurred interest income in connection with the financing arrangement as follows:
| For the Three Months Ended September 30, |  | For the Nine Months Ended September 30,
| 2020 |  | 2019 |  | 2020 |  | 2019
Distributions equal to the partner's share of net (loss) income | $ | (398) |  |  | $ | 1,278 |  |  | $ | 885 |  |  | $ | 5,157 |
Distributions in excess of the partner's share of net income | 398 |  |  | 2,118 |  |  | 3,356 |  |  | 6,071 |
Adjustment to fair value of financing arrangement obligation | (15,502) |  |  | (39,455) |  |  | (96,793) |  |  | (70,977) |
| $ | (15,502) |  |  | $ | (36,059) |  |  | $ | (92,552) |  |  | $ | (59,749) |

X
- Definition Co-Venture Arrangement [Abstract] + References No definition available. + Details
Name: | mac_CoVentureArrangementAbstract
Namespace Prefix: | mac_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financing Arrangement [Table Text Block] + References No definition available. + Details
Name: | mac_FinancingArrangementTableTextBlock
Namespace Prefix: | mac_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration