Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001403528-20-000022-index-headers.html | 2020-11-06 09:04:54 | |
| 0001403528-20-000022-index.html | 2020-11-06 09:04:54 | |
| 0001403528-20-000022.txt | 2020-11-06 09:04:54 | |
 0001403528-20-000022-xbrl.zip | 556906 | 2020-11-06 09:04:54 |
| exhibit3113q2020.htm | 10966 | 2020-11-06 09:04:54 |
| exhibit3123q2020.htm | 10980 | 2020-11-06 09:04:54 |
| exhibit3213q2020.htm | 5859 | 2020-11-06 09:04:54 |
| exhibit3223q2020.htm | 5673 | 2020-11-06 09:04:54 |
| FilingSummary.xml | 57234 | 2020-11-06 09:04:54 |
| Financial_Report.xlsx | 188982 | 2020-11-06 09:04:54 |
| MetaLinks.json | 992289 | 2020-11-06 09:04:54 |
| oak-20200930.htm | 3491512 | 2020-11-06 09:04:54 |
| oak-20200930.xsd | 105961 | 2020-11-06 09:04:54 |
| oak-20200930_cal.xml | 136170 | 2020-11-06 09:04:54 |
| oak-20200930_def.xml | 723374 | 2020-11-06 09:04:54 |
| oak-20200930_htm.xml | 3865355 | 2020-11-06 09:04:54 |
| oak-20200930_lab.xml | 1045439 | 2020-11-06 09:04:54 |
| oak-20200930_pre.xml | 828540 | 2020-11-06 09:04:54 |
| R1.htm | 61946 | 2020-11-06 09:04:54 |
| R10.htm | 33271 | 2020-11-06 09:04:54 |
| R11.htm | 13739 | 2020-11-06 09:04:54 |
| R12.htm | 195893 | 2020-11-06 09:04:54 |
| R13.htm | 322229 | 2020-11-06 09:04:54 |
| R14.htm | 109738 | 2020-11-06 09:04:54 |
| R15.htm | 13704 | 2020-11-06 09:04:54 |
| R16.htm | 5428 | 2020-11-06 09:04:54 |
| R17.htm | 59117 | 2020-11-06 09:04:54 |
| R18.htm | 23394 | 2020-11-06 09:04:54 |
| R19.htm | 15312 | 2020-11-06 09:04:54 |
| R2.htm | 116586 | 2020-11-06 09:04:54 |
| R20.htm | 53057 | 2020-11-06 09:04:54 |
| R21.htm | 19925 | 2020-11-06 09:04:54 |
| R22.htm | 44280 | 2020-11-06 09:04:54 |
| R23.htm | 13356 | 2020-11-06 09:04:54 |
| R24.htm | 12940 | 2020-11-06 09:04:54 |
| R25.htm | 31877 | 2020-11-06 09:04:54 |
| R26.htm | 9172 | 2020-11-06 09:04:54 |
| R27.htm | 5676 | 2020-11-06 09:04:54 |
| R28.htm | 151094 | 2020-11-06 09:04:54 |
| R29.htm | 30137 | 2020-11-06 09:04:54 |
| R3.htm | 24071 | 2020-11-06 09:04:54 |
| R30.htm | 13430 | 2020-11-06 09:04:54 |
| R31.htm | 194667 | 2020-11-06 09:04:54 |
| R32.htm | 372216 | 2020-11-06 09:04:54 |
| R33.htm | 158760 | 2020-11-06 09:04:54 |
| R34.htm | 12869 | 2020-11-06 09:04:54 |
| R35.htm | 110254 | 2020-11-06 09:04:54 |
| R36.htm | 25009 | 2020-11-06 09:04:54 |
| R37.htm | 15372 | 2020-11-06 09:04:54 |
| R38.htm | 47246 | 2020-11-06 09:04:54 |
| R39.htm | 15470 | 2020-11-06 09:04:54 |
| R4.htm | 98771 | 2020-11-06 09:04:54 |
| R40.htm | 19005 | 2020-11-06 09:04:54 |
| R41.htm | 17221 | 2020-11-06 09:04:54 |
| R42.htm | 47610 | 2020-11-06 09:04:54 |
| R43.htm | 62418 | 2020-11-06 09:04:54 |
| R44.htm | 21712 | 2020-11-06 09:04:54 |
| R45.htm | 9757 | 2020-11-06 09:04:54 |
| R46.htm | 24619 | 2020-11-06 09:04:54 |
| R47.htm | 12924 | 2020-11-06 09:04:54 |
| R48.htm | 14041 | 2020-11-06 09:04:54 |
| R49.htm | 14577 | 2020-11-06 09:04:54 |
| R5.htm | 37850 | 2020-11-06 09:04:54 |
| R50.htm | 28644 | 2020-11-06 09:04:54 |
| R51.htm | 12744 | 2020-11-06 09:04:54 |
| R52.htm | 140646 | 2020-11-06 09:04:54 |
| R53.htm | 28174 | 2020-11-06 09:04:54 |
| R54.htm | 44778 | 2020-11-06 09:04:54 |
| R55.htm | 29726 | 2020-11-06 09:04:54 |
| R56.htm | 10366 | 2020-11-06 09:04:54 |
| R57.htm | 100853 | 2020-11-06 09:04:54 |
| R58.htm | 57280 | 2020-11-06 09:04:54 |
| R59.htm | 42428 | 2020-11-06 09:04:54 |
| R6.htm | 112730 | 2020-11-06 09:04:54 |
| R60.htm | 16925 | 2020-11-06 09:04:54 |
| R61.htm | 11350 | 2020-11-06 09:04:54 |
| R62.htm | 26915 | 2020-11-06 09:04:54 |
| R63.htm | 21729 | 2020-11-06 09:04:54 |
| R64.htm | 51313 | 2020-11-06 09:04:54 |
| R65.htm | 16782 | 2020-11-06 09:04:54 |
| R66.htm | 17356 | 2020-11-06 09:04:54 |
| R67.htm | 49864 | 2020-11-06 09:04:54 |
| R68.htm | 57276 | 2020-11-06 09:04:54 |
| R69.htm | 19755 | 2020-11-06 09:04:54 |
| R7.htm | 96034 | 2020-11-06 09:04:54 |
| R70.htm | 13427 | 2020-11-06 09:04:54 |
| R71.htm | 19100 | 2020-11-06 09:04:54 |
| R72.htm | 20214 | 2020-11-06 09:04:54 |
| R73.htm | 7785 | 2020-11-06 09:04:54 |
| R74.htm | 9447 | 2020-11-06 09:04:54 |
| R75.htm | 9151 | 2020-11-06 09:04:54 |
| R76.htm | 19985 | 2020-11-06 09:04:54 |
| R77.htm | 18202 | 2020-11-06 09:04:54 |
| R78.htm | 56290 | 2020-11-06 09:04:54 |
| R79.htm | 43453 | 2020-11-06 09:04:54 |
| R8.htm | 21853 | 2020-11-06 09:04:54 |
| R80.htm | 12359 | 2020-11-06 09:04:54 |
| R81.htm | 12928 | 2020-11-06 09:04:54 |
| R82.htm | 25915 | 2020-11-06 09:04:54 |
| R83.htm | 16777 | 2020-11-06 09:04:54 |
| R84.htm | 17527 | 2020-11-06 09:04:54 |
| R85.htm | 67939 | 2020-11-06 09:04:54 |
| R86.htm | 30143 | 2020-11-06 09:04:54 |
| R87.htm | 41447 | 2020-11-06 09:04:54 |
| R88.htm | 10180 | 2020-11-06 09:04:54 |
| R89.htm | 15302 | 2020-11-06 09:04:54 |
| R9.htm | 91401 | 2020-11-06 09:04:54 |
| R90.htm | 5731 | 2020-11-06 09:04:54 |
| R91.htm | 28763 | 2020-11-06 09:04:54 |
| R92.htm | 26169 | 2020-11-06 09:04:54 |
| R93.htm | 39223 | 2020-11-06 09:04:54 |
| R94.htm | 4333 | 2020-11-06 09:04:54 |
| R95.htm | 8403 | 2020-11-06 09:04:54 |
| report.css | 2768 | 2020-11-06 09:04:54 |
| Show.js | 1086 | 2020-11-06 09:04:54 |