Contributions by our Sponsor - Additional Information (Detail) (USD $)	1 Months Ended	9 Months Ended			1 Months Ended						1 Months Ended	7 Months Ended		1 Months Ended			7 Months Ended	9 Months Ended	12 Months Ended
	Feb. 28, 2013	Sep. 30, 2013 Property	Sep. 30, 2012	Dec. 31, 2012 Property	Feb. 28, 2013 2,770 Property Contribution [Member] Property	Sep. 30, 2013 2,770 Property Contribution [Member] Sponsor [Member] Property	Dec. 31, 2012 2,770 Property Contribution [Member] Sponsor [Member] Property	Dec. 31, 2011 2,770 Property Contribution [Member] Sponsor [Member] Property	Sep. 30, 2013 Class A Common Shares [Member]	Dec. 31, 2012 Class A Common Shares [Member]	Feb. 28, 2013 Class B Common Shares [Member]	Sep. 30, 2013 Class B Common Shares [Member]	Dec. 31, 2012 Class B Common Shares [Member]	Feb. 28, 2013 Class B Common Shares [Member] 2,770 Property Contribution [Member]	Feb. 28, 2013 Series C convertible units [Member] 2,770 Property Contribution [Member] Operating Partnership [Member]	Feb. 28, 2013 Common Class C [Member]	Sep. 30, 2013 Series C Convertible Units [Member]	Sep. 30, 2013 Series C Convertible Units [Member] Operating Partnership [Member]	Dec. 31, 2012 2012 Offering [Member] Property	Dec. 31, 2012 2012 Offering [Member] Class A Common Shares [Member]	Dec. 31, 2012 2012 Offering [Member] Class B Common Shares [Member]
Significant Acquisitions and Disposals [Line Items]
Number of properties		21,267		3,644	2,770	109	2,628	33											367
Investment made in cash by sponsor																			$ 556,000
Contributed single-family properties value																			49,444,000
Acquisition fee																			5.00%
Common shares issue to sponsor									184,856,219	38,663,998	634,408	635,075	667	634,408						3,300,000	667
Units issue to sponsor															31,085,974				32,667
Net book value of properties contributed																			47,646,000
Costs to transfer title to the properties																			455,000
Total consideration amount					491,666,000
Common units issue to sponsor per unit															$ 15.50			$ 15.50
Common shares issue to sponsor per share														$ 15.50
Net asset value reclassified from additional paid-in capital	386,500,000	384,255,000	264,867,000
Units issue to sponsor, value																378,770,000
Common shares issue to sponsor, value											7,730,000
Other liabilities net associated with the properties	2,508,000	2,508,000
Costs of improvements		13,194,000
Increase in Units issued to sponsor																	12,930,000
Increase in common shares issue to sponsor												264,000
Total reduction to additional paid-in capital		356,453,000
Credit associated to properties acquired		19,552,000
Excess of par value associated with issuance of the shares		7,987,000
Par value of common shares		6,000
Permanent reduction in advisory fee	$ 9,800,000