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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
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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 |  |  |  |

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