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Shareholders' Equity / Partners' Capital - Conversion of Series C Convertible Units into Class A Units (Details) - AH LLC - Series C Convertible Units - Operating Partnership	Feb. 28, 2016 shares
Class of Stock [Line Items]
Units owned (in shares)	31,085,974
Business acquisition, equity interest issued or issuable, number of shares, multiplier	1

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- Definition

Business Acquisition, Equity Interest Issued or Issuable, Number of Shares, Multiplier

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- Definition

The number of units of the operating partnership owned by the noncontrolling interest, a related party.

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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.

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