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Significant accounting policies - Additional Information (Detail) (USD $) | 6 Months Ended | 12 Months Ended | 0 Months Ended |  | 6 Months Ended | 12 Months Ended |  | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2013 Segment Property | Dec. 31, 2012 Property | Feb. 28, 2013 2,770 Property Contribution [Member] Property | Dec. 31, 2012 2012 Offering [Member] Property | Dec. 31, 2011 2012 Offering [Member] 2,770 Property Contribution [Member] | Dec. 31, 2013 2012 Offering [Member] 2,770 Property Contribution [Member] | Dec. 31, 2012 2012 Offering [Member] 2,770 Property Contribution [Member] | Dec. 31, 2013 Senior Secured Revolving Credit Facility [Member] | Dec. 31, 2013 Single-Family Properties Held for Sale [Member] Property | Dec. 31, 2013 Class A Common Shares [Member] | Dec. 31, 2013 Improvements [Member] Minimum [Member] | Dec. 31, 2013 Improvements [Member] Maximum [Member] | Dec. 31, 2013 Buildings [Member]
Property Subject to or Available for Operating Lease [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of likelihood of being realized upon ultimate settlement |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized tax benefits |  | $ 0 |  |  |  |  |  |  |  |  |  |  |  |
Acquired leases term |  | Less than one year |  |  |  |  |  |  |  |  |  |  |  |
Number of properties |  | 23,268 | 3,644 | 2,770 | 367 |  |  |  |  | 44 |  |  |  |
Long-lived assets, impairment charge |  | 0 |  |  |  |  |  |  |  |  |  |  |  |
Lease amortization period |  | 1 year |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful life of asset |  |  |  |  |  |  |  |  |  |  |  | 5 years | 15 years | 30 years
Impairment of intangible assets |  | 0 |  |  |  |  |  |  |  |  |  |  |  |
Goodwill and other intangible assets, impairment |  | 0 |  |  |  |  |  |  |  |  |  |  |  |
Maturity period for demand deposits, cashier's checks, money market accounts and certificates of deposit to be cash equivalents |  | Three months or less |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | 1,200,000 | 0 |  |  |  |  |  |  |  |  |  |  |
Rescission receivables |  | 1,257,000 | 1,612,000 |  |  |  |  |  |  |  |  |  |  |
Term of lease |  | 1 year |  |  |  |  |  |  |  |  |  |  |  |
Stock options reclassified as grants to employees |  |  |  |  |  |  |  |  |  |  | 485,000 |  |  |
Debt instrument, basis spread on variable rate |  |  |  |  |  |  |  |  | 2.75% |  |  |  |  |
Debt instrument variable interest rate, description |  |  |  |  |  |  |  |  | 30 day LIBOR plus |  |  |  |  |
Debt instrument, description of variable rate basis |  |  |  |  |  |  |  |  | Company's credit facility bears variable interest at 30 day LIBOR plus 2.75% and was recently entered into on March 7, 2013 and further amended on September 30, 2013 |  |  |  |  |
Allocated general and administrative expenses | $ 47,000 | $ 8,845,000 | $ 7,199,000 | $ 7,989,000 |  | $ 47,000 | $ 993,000 | $ 6,949,000 |  |  |  |  |  |
Number of reportable segments |  | 1 |  |  |  |  |  |  |  |  |  |  |  |
Geographic market concentrations |  | The Company did not have any geographic market concentrations representing over 10% of total net book value of single-family properties. |  |  |  |  |  |  |  |  |  |  |  |

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