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Acquisitions and Dispositions Acquisitions and Dispositions - Alaska JV Acquisition (Details) $ in Thousands | Dec. 12, 2014 shares | Jun. 14, 2013 shares | Jun. 11, 2013 USD ($) single_family_property shares
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Alaska Joint Venture Acquisition |  |  |
Business Acquisition [Line Items] |  |  |
Acquired of membership interests |  |  | 100.00%
Number of properties acquired | single_family_property |  |  | 4,778
Percentage of properties leased as of acquisition date |  |  | 75.00%
Estimated fair values of the net assets |  |  |
Land |  |  | $ 156,648
Buildings and improvements |  |  | 740,396
Receivable for net cash flows prior to acquisition date |  |  | 1,896
Value of in-place leases |  |  | 5,547
Fair value of acquired assets |  |  | 904,487
Estimated net monetary assets |  |  | 13,000
Cash and cash equivalents |  |  | $ 23,000
Alaska Joint Venture Acquisition | Class A common shares |  |  |
Business Acquisition [Line Items] |  |  |
Issuance of common shares (in shares) | shares |  |  | 43,609,394
AH LLC | Class A common shares |  |  |
Business Acquisition [Line Items] |  |  |
Issuance of common shares (in shares) | shares |  | 705,167 |
Class A Units | AH LLC |  |  |
Business Acquisition [Line Items] |  |  |
Issuance of units (in shares) | shares | 653,378 |  |
Class A Units | Operating Partnership | Alaska Joint Venture Acquisition |  |  |
Business Acquisition [Line Items] |  |  |
Issuance of units (in shares) | shares |  |  | 12,395,965
Class A Units | Operating Partnership | AH LLC |  |  |
Business Acquisition [Line Items] |  |  |
Issuance of units (in shares) | shares |  |  | 12,395,965

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