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Debt (Details 3) - Mortgage loans - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Debt Instrument [Line Items] |  |
Carrying value of mortgages | $ 504,885 | $ 398,696
Bond principal balance | 352,590 | 270,580
Original balances at securitization cutoff date Mortgage UPB | 695,888 |
Original balances at securitization cutoff date Bond principal balance | 392,421 |
2014-A |  |
Debt Instrument [Line Items] |  |
Carrying value of mortgages | 53,606 | 55,098
Bond principal balance | 34,659 | 36,463
Original balances at securitization cutoff date Mortgage UPB | 81,405 |
Original balances at securitization cutoff date Bond principal balance | 45,000 |
2014-B |  |
Debt Instrument [Line Items] |  |
Carrying value of mortgages | 64,696 | 66,292
Bond principal balance | 32,919 | 35,646
Original balances at securitization cutoff date Mortgage UPB | 91,535 |
Original balances at securitization cutoff date Bond principal balance | 41,191 |
2015-A |  |
Debt Instrument [Line Items] |  |
Carrying value of mortgages | 52,991 | 53,673
Bond principal balance | 31,615 | 33,674
Original balances at securitization cutoff date Mortgage UPB | 75,835 |
Original balances at securitization cutoff date Bond principal balance | 35,643 |
2015-B |  |
Debt Instrument [Line Items] |  |
Carrying value of mortgages | 110,799 | 115,395
Bond principal balance | 81,305 | 84,973
Original balances at securitization cutoff date Mortgage UPB | 158,498 |
Original balances at securitization cutoff date Bond principal balance | 87,174 |
2015-C |  |
Debt Instrument [Line Items] |  |
Carrying value of mortgages | 104,015 | 108,238
Bond principal balance | 72,783 | 79,824
Original balances at securitization cutoff date Mortgage UPB | 130,130 |
Original balances at securitization cutoff date Bond principal balance | 81,982 |
2016-A |  |
Debt Instrument [Line Items] |  |
Carrying value of mortgages | 118,778 |
Bond principal balance | 99,309 |
Original balances at securitization cutoff date Mortgage UPB | 158,485 |
Original balances at securitization cutoff date Bond principal balance | $ 101,431 |

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- Definition Represents mortgage loans on real estate, Unpaid principal balance at cutoff date. + References No definition available. + Details
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- Definition The carrying amount of the outstanding balance due under the mortgage loan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
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- Definition Amount of the contractual principal due at the origination of the mortgage loan (face amount). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 + Details
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