Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-17-136783-index-headers.html | 2017-04-25 16:22:25 | |
| 0001193125-17-136783-index.html | 2017-04-25 16:22:25 | |
| 0001193125-17-136783.txt | 2017-04-25 16:22:25 | |
 0001193125-17-136783-xbrl.zip | 236978 | 2017-04-25 16:22:25 |
| bxmt-20170331.xml | 1715401 | 2017-04-25 16:22:25 |
| bxmt-20170331.xsd | 88115 | 2017-04-25 16:22:25 |
| bxmt-20170331_cal.xml | 79562 | 2017-04-25 16:22:25 |
| bxmt-20170331_def.xml | 376058 | 2017-04-25 16:22:25 |
| bxmt-20170331_lab.xml | 619962 | 2017-04-25 16:22:25 |
| bxmt-20170331_pre.xml | 531107 | 2017-04-25 16:22:25 |
| d336312d10q.htm | 1145455 | 2017-04-25 16:22:25 |
| d336312dex101.htm | 474725 | 2017-04-25 16:22:25 |
| d336312dex102.htm | 16527 | 2017-04-25 16:22:25 |
| d336312dex103.htm | 18518 | 2017-04-25 16:22:25 |
| d336312dex104.htm | 34737 | 2017-04-25 16:22:25 |
| d336312dex105.htm | 461379 | 2017-04-25 16:22:25 |
| d336312dex106.htm | 18168 | 2017-04-25 16:22:25 |
| d336312dex107.htm | 455702 | 2017-04-25 16:22:25 |
| d336312dex108.htm | 21318 | 2017-04-25 16:22:25 |
| d336312dex311.htm | 12371 | 2017-04-25 16:22:25 |
| d336312dex312.htm | 12386 | 2017-04-25 16:22:25 |
| d336312dex321.htm | 4559 | 2017-04-25 16:22:25 |
| d336312dex322.htm | 4574 | 2017-04-25 16:22:25 |
| d336312dex991.htm | 4119 | 2017-04-25 16:22:25 |
| FilingSummary.xml | 54073 | 2017-04-25 16:22:25 |
| Financial_Report.xlsx | 112288 | 2017-04-25 16:22:25 |
 g336312g0421093220127.jpg | 3940 | 2017-04-25 16:22:25 |
 g336312g29g19.jpg | 79774 | 2017-04-25 16:22:25 |
| R1.htm | 21951 | 2017-04-25 16:22:25 |
| R10.htm | 107937 | 2017-04-25 16:22:25 |
| R11.htm | 8812 | 2017-04-25 16:22:25 |
| R12.htm | 20030 | 2017-04-25 16:22:25 |
| R13.htm | 142996 | 2017-04-25 16:22:25 |
| R14.htm | 17979 | 2017-04-25 16:22:25 |
| R15.htm | 9892 | 2017-04-25 16:22:25 |
| R16.htm | 70363 | 2017-04-25 16:22:25 |
| R17.htm | 33846 | 2017-04-25 16:22:25 |
| R18.htm | 25857 | 2017-04-25 16:22:25 |
| R19.htm | 10787 | 2017-04-25 16:22:25 |
| R2.htm | 46198 | 2017-04-25 16:22:25 |
| R20.htm | 14827 | 2017-04-25 16:22:25 |
| R21.htm | 37691 | 2017-04-25 16:22:25 |
| R22.htm | 10704 | 2017-04-25 16:22:25 |
| R23.htm | 10912 | 2017-04-25 16:22:25 |
| R24.htm | 102705 | 2017-04-25 16:22:25 |
| R25.htm | 111341 | 2017-04-25 16:22:25 |
| R26.htm | 21562 | 2017-04-25 16:22:25 |
| R27.htm | 142943 | 2017-04-25 16:22:25 |
| R28.htm | 17403 | 2017-04-25 16:22:25 |
| R29.htm | 69067 | 2017-04-25 16:22:25 |
| R3.htm | 10744 | 2017-04-25 16:22:25 |
| R30.htm | 24418 | 2017-04-25 16:22:25 |
| R31.htm | 19805 | 2017-04-25 16:22:25 |
| R32.htm | 10412 | 2017-04-25 16:22:25 |
| R33.htm | 40337 | 2017-04-25 16:22:25 |
| R34.htm | 18944 | 2017-04-25 16:22:25 |
| R35.htm | 22365 | 2017-04-25 16:22:25 |
| R36.htm | 12717 | 2017-04-25 16:22:25 |
| R37.htm | 32224 | 2017-04-25 16:22:25 |
| R38.htm | 68774 | 2017-04-25 16:22:25 |
| R39.htm | 4194 | 2017-04-25 16:22:25 |
| R4.htm | 43987 | 2017-04-25 16:22:25 |
| R40.htm | 30659 | 2017-04-25 16:22:25 |
| R41.htm | 4198 | 2017-04-25 16:22:25 |
| R42.htm | 6054 | 2017-04-25 16:22:25 |
| R43.htm | 19698 | 2017-04-25 16:22:25 |
| R44.htm | 17564 | 2017-04-25 16:22:25 |
| R45.htm | 15612 | 2017-04-25 16:22:25 |
| R46.htm | 16742 | 2017-04-25 16:22:25 |
| R47.htm | 117631 | 2017-04-25 16:22:25 |
| R48.htm | 54077 | 2017-04-25 16:22:25 |
| R49.htm | 25812 | 2017-04-25 16:22:25 |
| R5.htm | 22886 | 2017-04-25 16:22:25 |
| R50.htm | 61848 | 2017-04-25 16:22:25 |
| R51.htm | 13117 | 2017-04-25 16:22:25 |
| R52.htm | 61379 | 2017-04-25 16:22:25 |
| R53.htm | 23420 | 2017-04-25 16:22:25 |
| R54.htm | 14609 | 2017-04-25 16:22:25 |
| R55.htm | 53059 | 2017-04-25 16:22:25 |
| R56.htm | 18414 | 2017-04-25 16:22:25 |
| R57.htm | 31089 | 2017-04-25 16:22:25 |
| R58.htm | 10234 | 2017-04-25 16:22:25 |
| R59.htm | 14380 | 2017-04-25 16:22:25 |
| R6.htm | 36553 | 2017-04-25 16:22:25 |
| R60.htm | 18410 | 2017-04-25 16:22:25 |
| R61.htm | 20452 | 2017-04-25 16:22:25 |
| R62.htm | 15792 | 2017-04-25 16:22:25 |
| R63.htm | 7196 | 2017-04-25 16:22:25 |
| R64.htm | 59508 | 2017-04-25 16:22:25 |
| R65.htm | 12635 | 2017-04-25 16:22:25 |
| R66.htm | 8592 | 2017-04-25 16:22:25 |
| R67.htm | 6830 | 2017-04-25 16:22:25 |
| R68.htm | 10207 | 2017-04-25 16:22:25 |
| R69.htm | 29042 | 2017-04-25 16:22:25 |
| R7.htm | 92997 | 2017-04-25 16:22:25 |
| R70.htm | 30057 | 2017-04-25 16:22:25 |
| R71.htm | 33304 | 2017-04-25 16:22:25 |
| R72.htm | 34712 | 2017-04-25 16:22:25 |
| R73.htm | 23508 | 2017-04-25 16:22:25 |
| R74.htm | 16306 | 2017-04-25 16:22:25 |
| R75.htm | 13383 | 2017-04-25 16:22:25 |
| R76.htm | 40526 | 2017-04-25 16:22:25 |
| R77.htm | 51565 | 2017-04-25 16:22:25 |
| R78.htm | 38491 | 2017-04-25 16:22:25 |
| R8.htm | 7965 | 2017-04-25 16:22:25 |
| R9.htm | 65946 | 2017-04-25 16:22:25 |
| report.css | 2768 | 2017-04-25 16:22:25 |
| Show.js | 1411 | 2017-04-25 16:22:25 |