Asset acquisitions and dispositions	6 Months Ended
Jun. 30, 2016
Business Combinations [Abstract]
Asset acquisitions and dispositions	Asset acquisitions and dispositions Real estate assets Acquisitions, including those accounted for as business combinations On March 30, 2016, we completed the acquisition of 590 single-family residential properties in five states from an unrelated third party for an aggregate purchase price of approximately $64.8 million. We recognized acquisition fees and costs related to this portfolio acquisition of $0.6 million. The value of in-place leases was estimated at $0.7 million based upon the costs we would have incurred to lease the properties and is being amortized over the weighted-average remaining life of the leases of 7 months as of the acquisition date. During the three and six months ended June 30, 2016, we acquired 291 and 404 residential properties, respectively, under our one-by-one acquisition program. The aggregate purchase price attributable to these acquired properties was $30.0 million and $40.1 million, respectively. During the three and six months ended June 30, 2015, we did not purchase any real estate assets. Dispositions During the three and six months ended June 30, 2016, we sold 910 and 1,596 residential properties, respectively, and recorded $39.1 million and $68.5 million, respectively, of net realized gains on real estate. During the three and six months ended June 30, 2015, we sold 321 and 575 residential properties, respectively, and recorded $12.4 million and $23.0 million, respectively, of net realized gains on real estate. Mortgage loan assets Resolutions and dispositions During the three and six months ended June 30, 2016, we resolved 122 and 291 mortgage loans, respectively, primarily through short sales, refinancing and foreclosure sales. In connection with these resolutions, we recorded $8.2 million and $20.9 million, respectively, of net realized gains on mortgage loans. During the three and six months ended June 30, 2015, we resolved 270 and 420 mortgage loans, respectively, primarily through short sales, refinancing and foreclosure sales. In connection with these resolutions, we recorded $19.3 million and $34.7 million, respectively, of net realized gains on mortgage loans. Dispositions During the three and six months ended June 30, 2016, we sold 895 and 1,973, respectively, of our mortgage loans held for sale to third party purchasers. In connection with these sales, we recorded $16.0 million and $50.1 million, respectively, of net realized gains on mortgage loans held for sale. During the three and six months ended June 30, 2015, we did not sell any mortgage loans. Transfers of mortgage loans to real estate owned During the three and six months ended June 30, 2016, we transferred an aggregate of 308 and 668 mortgage loans, respectively, to REO at an aggregate fair value based on BPOs of $59.4 million and $124.3 million, respectively. Such transfers occur when the foreclosure sale is complete. In connection with these transfers to REO, we recorded $12.5 million and $24.1 million, respectively, in change in unrealized gains on mortgage loans. During the three and six months ended June 30, 2015, we transferred an aggregate of 687 and 1,411 mortgage loans, respectively, to REO at an aggregate fair value based on BPOs of $133.9 million and $268.7 million, respectively. Such transfers occur when the foreclosure sale is complete. In connection with these transfers to REO, we recorded $24.2 million and $51.3 million, respectively, in change in unrealized gains on mortgage loans. Due diligence costs During the three and six months ended June 30, 2016, we recognized $0.4 million and $0.6 million, respectively, of due diligence costs, and we recognized $0.3 million and $0.4 million, respectively, of due diligence costs during the three and six months ended June 30, 2015. These due diligence costs related to the above-described and other transactions in our consolidated statement of operations as acquisition fees and costs.

Asset acquisitions and dispositions

Real estate assets

Acquisitions, including those accounted for as business combinations

On March 30, 2016, we completed the acquisition of 590 single-family residential properties in five states from an unrelated third party for an aggregate purchase price of approximately $64.8 million. We recognized acquisition fees and costs related to this portfolio acquisition of $0.6 million. The value of in-place leases was estimated at $0.7 million based upon the costs we would have incurred to lease the properties and is being amortized over the weighted-average remaining life of the leases of 7 months as of the acquisition date.

During the three and six months ended June 30, 2016, we acquired 291 and 404 residential properties, respectively, under our one-by-one acquisition program. The aggregate purchase price attributable to these acquired properties was $30.0 million and $40.1 million, respectively.

During the three and six months ended June 30, 2015, we did not purchase any real estate assets.

Dispositions

During the three and six months ended June 30, 2016, we sold 910 and 1,596 residential properties, respectively, and recorded $39.1 million and $68.5 million, respectively, of net realized gains on real estate.

During the three and six months ended June 30, 2015, we sold 321 and 575 residential properties, respectively, and recorded $12.4 million and $23.0 million, respectively, of net realized gains on real estate.

Mortgage loan assets

Resolutions and dispositions

During the three and six months ended June 30, 2016, we resolved 122 and 291 mortgage loans, respectively, primarily through short sales, refinancing and foreclosure sales. In connection with these resolutions, we recorded $8.2 million and $20.9 million, respectively, of net realized gains on mortgage loans.

During the three and six months ended June 30, 2015, we resolved 270 and 420 mortgage loans, respectively, primarily through short sales, refinancing and foreclosure sales. In connection with these resolutions, we recorded $19.3 million and $34.7 million, respectively, of net realized gains on mortgage loans.

Dispositions

During the three and six months ended June 30, 2016, we sold 895 and 1,973, respectively, of our mortgage loans held for sale to third party purchasers. In connection with these sales, we recorded $16.0 million and $50.1 million, respectively, of net realized gains on mortgage loans held for sale.

During the three and six months ended June 30, 2015, we did not sell any mortgage loans.

Transfers of mortgage loans to real estate owned

During the three and six months ended June 30, 2016, we transferred an aggregate of 308 and 668 mortgage loans, respectively, to REO at an aggregate fair value based on BPOs of $59.4 million and $124.3 million, respectively. Such transfers occur when the foreclosure sale is complete. In connection with these transfers to REO, we recorded $12.5 million and $24.1 million, respectively, in change in unrealized gains on mortgage loans.

During the three and six months ended June 30, 2015, we transferred an aggregate of 687 and 1,411 mortgage loans, respectively, to REO at an aggregate fair value based on BPOs of $133.9 million and $268.7 million, respectively. Such transfers occur when the foreclosure sale is complete. In connection with these transfers to REO, we recorded $24.2 million and $51.3 million, respectively, in change in unrealized gains on mortgage loans.

Due diligence costs

During the three and six months ended June 30, 2016, we recognized $0.4 million and $0.6 million, respectively, of due diligence costs, and we recognized $0.3 million and $0.4 million, respectively, of due diligence costs during the three and six months ended June 30, 2015. These due diligence costs related to the above-described and other transactions in our consolidated statement of operations as acquisition fees and costs.