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Shareholders' Equity - Conversion of Series C Convertible Units into Class A Units (Details) - AH LLC - Series C Convertible Units | Sep. 30, 2016 shares | Feb. 28, 2016 shares | Dec. 31, 2015 shares
--- | --- | --- | ---
Class of Stock [Line Items] |  |  |
Ownership units owned (in shares) | 0 |  | 31,085,974
Operating Partnership |  |  |
Class of Stock [Line Items] |  |  |
Ownership units owned (in shares) | 0 | 31,085,974 | 31,085,974
Ownership units exchange ratio |  | 1 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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- Details
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