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Shareholders' equity - Additional Information (Detail) (USD $)
 12 Months Ended 1 Months Ended 1 Months Ended 2 Months Ended 12 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended
Dec. 31, 2013
Dec. 31, 2013
Minimum [Member]
Dec. 31, 2013
Maximum [Member]
Dec. 31, 2013
2013 Offering [Member]
Dec. 31, 2013
2012 Offering [Member]
Nov. 30, 2013
Class A Common Shares [Member]
Aug. 31, 2013
Class A Common Shares [Member]
Dec. 31, 2013
Class A Common Shares [Member]
Sponsor [Member]
Dec. 31, 2012
Class A Common Shares [Member]
Sponsor [Member]
Mar. 31, 2013
Class A Common Shares [Member]
2013 Offering [Member]
Dec. 31, 2012
Class A Common Shares [Member]
2012 Offering [Member]
Dec. 31, 2013
Class B Common Shares [Member]
Vote
Dec. 31, 2013
Class B Common Shares [Member]
Sponsor [Member]
Nov. 30, 2013
Series A Preferred Shares [Member]
Oct. 31, 2013
Series A Preferred Shares [Member]
Dec. 31, 2013
Series A Preferred Shares [Member]
Dec. 31, 2013
Class A Units [Member]
Sponsor [Member]
Dec. 31, 2012
Class A Units [Member]
Sponsor [Member]
Dec. 31, 2013
Class A Units [Member]
Operating Partnership [Member]
Dec. 31, 2012
Class A Units [Member]
Operating Partnership [Member]
Dec. 31, 2013
Series B Preferred Shares [Member]
Dec. 31, 2013
Series B Preferred Shares [Member]
Jan. 31, 2014
Series B Preferred Shares [Member]
Subsequent Events [Member]
Class of Stock [Line Items]                                              
Common shares sold                   46,718,750,000 35,360,898,000                        
Common shares sold in connection with the IPO             55,422,794                 5,060,000           4,000,000  
Dividend payable per share           $ 0.05               $ 0.229167                  
Dividend payable date           Jan. 10, 2014               Dec. 31, 2013                  
Dividend record date           Dec. 15, 2013               Dec. 15, 2013                  
Dividend payable, amount           $ 9,274,000                                  
Common stock issued in connection with investment                         635,075                    
Common shares entitled to vote                       50                      
Voting interest       30.00% 30.00%                                    
Cumulative annual cash dividend rate 5.00%                             5.00%           5.00%  
Liquidation preference per share $ 25                                            
Preferred stock redemption features Any time between September 30, 2017 and September 30, 2020 (the "initial redemption period"), the Company has the option to redeem the Preferred Shares for cash or Class A common shares, at a redemption price equal to the initial liquidation preference, adjusted by an amount equal to 50% of the cumulative change in value of an index based on the purchase prices of single-family properties located in our top 20 markets (the "HPA adjustment").                                            
Initial redemption period   Sep. 30, 2017 Sep. 30, 2020                                        
Preferred stock, cumulative change in value of index based on purchase prices of single-family properties 50.00%                                            
Preferred stock, maximum internal rate of return considering initial liquidation liquidation preference 9.00%                                            
Increase in cumulative annual cash dividend rate 10.00%                                            
Sale of preferred stock, value 212,596,000                           126,500,000           110,000,000   110,000,000
Offering costs                             $ 7,319,000           $ 6,585,000 $ 6,585,000 $ 6,585,000
Sale of preferred stock, shares 9,060,000                           5,060,000           4,400,000 4,400,000 4,400,000
Percentage of units outstanding               3.70% 8.50%                   93.10% 99.90%      
Units outstanding                                 13,787,292 32,668 199,291,586 38,697,333      
Stock split conversion ratio                                     1