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Organization and Operations (Details)
$ in Thousands
 1 Months Ended 12 Months Ended
Jun. 10, 2013
shares
May. 31, 2014
USD ($)
shares
Jan. 31, 2014
USD ($)
shares
Dec. 31, 2013
USD ($)
shares
Oct. 31, 2013
Dec. 31, 2015
USD ($)
state
single_family_property
Dec. 31, 2014
USD ($)
state
single_family_property
shares
Dec. 31, 2013
USD ($)
shares
Dec. 31, 2012
USD ($)
Organization and operations                  
Number of properties | single_family_property           38,780 34,599    
Number of states | state           22 22    
Net proceeds from issuance of preferred shares           $ 0 $ 189,433 $ 212,596  
Series A Preferred Stock                  
Organization and operations                  
Proceeds from offering before fees             126,500    
Net proceeds from issuance of preferred shares               126,500  
Offering costs       $ 7,300     $ 7,300 $ 7,300  
Preferred units issued (in shares) | shares       5,060,000       5,060,000  
Sale of stock, number of shares issued (in shares) | shares             5,060,000    
Preferred Shares dividend rate         5.00% 5.00% 5.00% 5.00%  
Series B Preferred Stock                  
Organization and operations                  
Proceeds from offering before fees             $ 110,000    
Net proceeds from issuance of preferred shares     $ 110,000 $ 110,000          
Offering costs     $ 6,600 $ 6,600     $ 6,600 $ 6,600  
Preferred units issued (in shares) | shares     4,400,000 4,400,000       4,400,000  
Sale of stock, number of shares issued (in shares) | shares             4,400,000    
Preferred Shares dividend rate     5.00% 5.00%   5.00% 5.00% 5.00%  
Series C Preferred Stock                  
Organization and operations                  
Proceeds from offering before fees             $ 190,000    
Net proceeds from issuance of preferred shares   $ 190,000           $ 190,000  
Offering costs   $ 9,700   $ 9,700     $ 9,700 $ 9,700  
Preferred units issued (in shares) | shares   7,600,000   7,600,000       7,600,000  
Sale of stock, number of shares issued (in shares) | shares             7,600,000    
Preferred Shares dividend rate   5.50%       5.50% 5.50% 5.50%  
2012 Offering                  
Organization and operations                  
Proceeds from offering before fees                 $ 530,400
Fees associated with the sale of stock                 40,900
2012 Offering | AH LLC                  
Organization and operations                  
Proceeds from offering before fees                 $ 5,300
2013 Offering                  
Organization and operations                  
Proceeds from offering before fees               $ 747,500  
Fees associated with the sale of stock               44,000  
IPO                  
Organization and operations                  
Proceeds from offering before fees               811,800  
Fees associated with the sale of stock               42,000  
2013 Concurrent Private Placements                  
Organization and operations                  
Proceeds from offering before fees               $ 75,000  
Operating Partnership | Series D Convertible Units                  
Organization and operations                  
Issuance of units (in shares) | shares 4,375,000                
Operating Partnership | Series E Convertible Units                  
Organization and operations                  
Issuance of units (in shares) | shares 4,375,000                
Single family homes                  
Organization and operations                  
Number of properties | single_family_property           38,780 34,599    
Properties held for sale | Single family homes                  
Organization and operations                  
Number of properties | single_family_property           45      
Single-Family Properties Held for Sale | Properties held for sale | Single family homes                  
Organization and operations                  
Number of properties | single_family_property             26