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Contributions by AH LLC (Details) |  |  |  |  | 2 Months Ended | 10 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 12, 2014 single_family_property property $ / shares shares | Jun. 14, 2013 USD ($) shares | Jun. 11, 2013 shares | Feb. 28, 2013 USD ($) $ / shares shares | Feb. 28, 2013 USD ($) single_family_property $ / shares | Feb. 28, 2013 USD ($) $ / shares | Feb. 28, 2013 USD ($) property $ / shares | Feb. 28, 2013 USD ($) property $ / shares | Dec. 31, 2013 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Formation of consolidated joint venture |  |  |  |  |  |  |  |  |  |  | $ 500,000
Units issue to Sponsor, value |  |  |  |  |  |  |  |  |  | $ 1,546,000 | 35,817,000
Other liabilities |  |  |  | $ 2,500,000 | $ 2,500,000 | $ 2,500,000 | $ 2,500,000 | $ 2,500,000 |  |  |
Cost of improvement |  |  |  |  |  |  |  |  | $ 13,800,000 |  | 13,800,000
Reduction to additional paid in capital |  |  |  |  |  |  |  |  |  |  | $ 356,400,000
Adjustments to additional paid in capital, credit associated to properties acquired |  |  |  |  |  |  |  | 19,600,000 |  |  |
Adjustments to additional paid in capital related to issuance costs |  |  |  |  |  | 8,000,000 |  |  |  |  |
Change in par value of common stock value |  |  |  |  |  | 6,000 |  |  |  |  |
Decrease in advisory fee |  |  |  |  |  | 9,800,000 |  |  |  |  |
2,770 Property Contribution |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Number of properties |  |  |  |  | 2,770 |  | 2,770 |  |  |  |
Other liabilities |  |  |  | $ 7,625,000 | $ 7,625,000 | 7,625,000 | $ 7,625,000 | $ 7,625,000 |  |  |
Series C Convertible Units |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Increase in common units issued |  |  |  |  |  |  |  |  | 13,500,000 |  |
Class B common shares |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Increase in common units issued |  |  |  |  |  |  |  |  | $ 300,000 |  |
AH LLC |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Number of properties | property | 45 |  |  |  |  |  |  |  |  |  |
AH LLC | 2,770 Property Contribution |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Total consideration amount |  |  |  |  |  | $ 491,700,000 |  |  |  |  |
Common shares issue to Sponsor per share (in dollars per share) | $ / shares |  |  |  | $ 15.50 | $ 15.50 | $ 15.50 | $ 15.50 | $ 15.50 |  |  |
AH LLC | Class A Units |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Number of properties | single_family_property | 45 |  |  |  |  |  |  |  |  |  |
Units issue to Sponsor (in shares) | shares | 653,378 |  |  |  |  |  |  |  |  |  |
Common units issue to Sponsor per unit (in dollars per share) | $ / shares | $ 17.11 |  |  |  |  |  |  |  |  |  |
AH LLC | Class A common shares |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Common shares issued to Sponsor in 2012 offering (in shares) | shares |  | 705,167 |  |  |  |  |  |  |  |  |
Formation of consolidated joint venture |  | $ 11,300,000 |  |  |  |  |  |  |  |  |
AH LLC | Class B common shares |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Common shares issued to Sponsor in 2012 offering (in shares) | shares |  |  |  | 634,408 |  |  |  |  |  |  |
Units issue to Sponsor, value |  |  |  |  |  | $ 7,700,000 |  |  |  |  |
AH LLC | Class B common shares | 2,770 Property Contribution |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Common shares issued to Sponsor in 2012 offering (in shares) | shares |  |  |  | 634,408 |  |  |  |  |  |  |
Operating Partnership | AH LLC | Class A Units |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Units issue to Sponsor (in shares) | shares |  |  | 12,395,965 |  |  |  |  |  |  |  |
Operating Partnership | AH LLC | Series C Convertible Units |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Formation of consolidated joint venture |  |  |  |  |  | 378,800,000 |  |  |  |  |
Operating Partnership | AH LLC | Series C Convertible Units | 2,770 Property Contribution |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Units issue to Sponsor (in shares) | shares |  |  |  | 31,085,974 |  |  |  |  |  |  |
Formation of consolidated joint venture |  |  |  |  |  | 378,800,000 |  |  |  |  |
Sponsor | Class A Units |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Common units issue to Sponsor per unit (in dollars per share) | $ / shares | $ 17.11 |  |  |  |  |  |  |  |  |  |
Sponsor | Class B common shares | 2,770 Property Contribution |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Units issue to Sponsor, value |  |  |  |  |  | 7,700,000 |  |  |  |  |
Sponsor | Operating Partnership |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Net book value |  |  |  |  |  | 386,500,000 |  |  |  |  |
Sponsor | Operating Partnership | 2,770 Property Contribution |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Number of properties | property |  |  |  |  |  |  | 2,770 |  |  |  |
Net book value |  |  |  |  |  | 386,500,000 |  |  |  |  |
Period from January 1, 2013, to February 28, 2013 | 2,770 Property Contribution |  |  |  |  |  |  |  |  |  |  |
Significant Acquisitions and Disposals |  |  |  |  |  |  |  |  |  |  |
Number of properties | property |  |  |  |  |  |  |  | 109 |  |  |
Other liabilities |  |  |  | $ (558,000) | $ (558,000) | $ (558,000) | $ (558,000) | $ (558,000) |  |  |

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