Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001053507-21-000085-index-headers.html | 2021-04-29 16:19:15 | |
| 0001053507-21-000085-index.html | 2021-04-29 16:19:15 | |
| 0001053507-21-000085.txt | 2021-04-29 16:19:15 | |
 0001053507-21-000085-xbrl.zip | 392592 | 2021-04-29 16:19:15 |
| amt-20210331.htm | 2427660 | 2021-04-29 16:19:15 |
| amt-20210331.xsd | 80277 | 2021-04-29 16:19:15 |
| amt-20210331_cal.xml | 126602 | 2021-04-29 16:19:15 |
| amt-20210331_def.xml | 431339 | 2021-04-29 16:19:15 |
| amt-20210331_htm.xml | 2219518 | 2021-04-29 16:19:15 |
| amt-20210331_lab.xml | 841870 | 2021-04-29 16:19:15 |
| amt-20210331_pre.xml | 610355 | 2021-04-29 16:19:15 |
| exhibit311q12021.htm | 12786 | 2021-04-29 16:19:15 |
| exhibit312q12021.htm | 12938 | 2021-04-29 16:19:15 |
| exhibit32q12021.htm | 9705 | 2021-04-29 16:19:15 |
| FilingSummary.xml | 52938 | 2021-04-29 16:19:15 |
| Financial_Report.xlsx | 129433 | 2021-04-29 16:19:15 |
| MetaLinks.json | 829511 | 2021-04-29 16:19:15 |
| R1.htm | 64887 | 2021-04-29 16:19:15 |
| R10.htm | 57915 | 2021-04-29 16:19:15 |
| R11.htm | 67658 | 2021-04-29 16:19:15 |
| R12.htm | 13929 | 2021-04-29 16:19:15 |
| R13.htm | 160060 | 2021-04-29 16:19:15 |
| R14.htm | 54940 | 2021-04-29 16:19:15 |
| R15.htm | 18480 | 2021-04-29 16:19:15 |
| R16.htm | 126960 | 2021-04-29 16:19:15 |
| R17.htm | 31559 | 2021-04-29 16:19:15 |
| R18.htm | 14372 | 2021-04-29 16:19:15 |
| R19.htm | 34965 | 2021-04-29 16:19:15 |
| R2.htm | 118333 | 2021-04-29 16:19:15 |
| R20.htm | 20596 | 2021-04-29 16:19:15 |
| R21.htm | 37816 | 2021-04-29 16:19:15 |
| R22.htm | 22891 | 2021-04-29 16:19:15 |
| R23.htm | 12927 | 2021-04-29 16:19:15 |
| R24.htm | 46235 | 2021-04-29 16:19:15 |
| R25.htm | 111464 | 2021-04-29 16:19:15 |
| R26.htm | 21723 | 2021-04-29 16:19:15 |
| R27.htm | 57748 | 2021-04-29 16:19:15 |
| R28.htm | 14633 | 2021-04-29 16:19:15 |
| R29.htm | 56818 | 2021-04-29 16:19:15 |
| R3.htm | 13099 | 2021-04-29 16:19:15 |
| R30.htm | 58223 | 2021-04-29 16:19:15 |
| R31.htm | 18114 | 2021-04-29 16:19:15 |
| R32.htm | 113036 | 2021-04-29 16:19:15 |
| R33.htm | 28997 | 2021-04-29 16:19:15 |
| R34.htm | 8570 | 2021-04-29 16:19:15 |
| R35.htm | 31755 | 2021-04-29 16:19:15 |
| R36.htm | 15454 | 2021-04-29 16:19:15 |
| R37.htm | 28998 | 2021-04-29 16:19:15 |
| R38.htm | 24436 | 2021-04-29 16:19:15 |
| R39.htm | 38584 | 2021-04-29 16:19:15 |
| R4.htm | 87184 | 2021-04-29 16:19:15 |
| R40.htm | 102155 | 2021-04-29 16:19:15 |
| R41.htm | 12763 | 2021-04-29 16:19:15 |
| R42.htm | 12369 | 2021-04-29 16:19:15 |
| R43.htm | 44087 | 2021-04-29 16:19:15 |
| R44.htm | 16222 | 2021-04-29 16:19:15 |
| R45.htm | 16352 | 2021-04-29 16:19:15 |
| R46.htm | 10248 | 2021-04-29 16:19:15 |
| R47.htm | 7192 | 2021-04-29 16:19:15 |
| R48.htm | 6674 | 2021-04-29 16:19:15 |
| R49.htm | 10408 | 2021-04-29 16:19:15 |
| R5.htm | 4986 | 2021-04-29 16:19:15 |
| R50.htm | 24467 | 2021-04-29 16:19:15 |
| R51.htm | 26014 | 2021-04-29 16:19:15 |
| R52.htm | 25474 | 2021-04-29 16:19:15 |
| R53.htm | 9310 | 2021-04-29 16:19:15 |
| R54.htm | 15143 | 2021-04-29 16:19:15 |
| R55.htm | 23554 | 2021-04-29 16:19:15 |
| R56.htm | 125771 | 2021-04-29 16:19:15 |
| R57.htm | 13073 | 2021-04-29 16:19:15 |
| R58.htm | 12130 | 2021-04-29 16:19:15 |
| R59.htm | 21955 | 2021-04-29 16:19:15 |
| R6.htm | 34994 | 2021-04-29 16:19:15 |
| R60.htm | 17107 | 2021-04-29 16:19:15 |
| R61.htm | 39630 | 2021-04-29 16:19:15 |
| R62.htm | 15867 | 2021-04-29 16:19:15 |
| R63.htm | 15784 | 2021-04-29 16:19:15 |
| R64.htm | 8497 | 2021-04-29 16:19:15 |
| R65.htm | 34503 | 2021-04-29 16:19:15 |
| R66.htm | 7144 | 2021-04-29 16:19:15 |
| R67.htm | 21546 | 2021-04-29 16:19:15 |
| R68.htm | 16098 | 2021-04-29 16:19:15 |
| R69.htm | 18885 | 2021-04-29 16:19:15 |
| R7.htm | 10048 | 2021-04-29 16:19:15 |
| R70.htm | 4611 | 2021-04-29 16:19:15 |
| R71.htm | 47291 | 2021-04-29 16:19:15 |
| R72.htm | 13307 | 2021-04-29 16:19:15 |
| R73.htm | 12889 | 2021-04-29 16:19:15 |
| R74.htm | 36373 | 2021-04-29 16:19:15 |
| R75.htm | 40583 | 2021-04-29 16:19:15 |
| R76.htm | 15361 | 2021-04-29 16:19:15 |
| R77.htm | 38743 | 2021-04-29 16:19:15 |
| R78.htm | 14454 | 2021-04-29 16:19:15 |
| R79.htm | 26955 | 2021-04-29 16:19:15 |
| R8.htm | 91016 | 2021-04-29 16:19:15 |
| R80.htm | 6901 | 2021-04-29 16:19:15 |
| R81.htm | 25235 | 2021-04-29 16:19:15 |
| R82.htm | 6625 | 2021-04-29 16:19:15 |
| R83.htm | 73174 | 2021-04-29 16:19:15 |
| R84.htm | 35911 | 2021-04-29 16:19:15 |
| R85.htm | 13468 | 2021-04-29 16:19:15 |
| R86.htm | 77393 | 2021-04-29 16:19:15 |
| R9.htm | 4652 | 2021-04-29 16:19:15 |
| R9999.htm | 7647 | 2021-04-29 16:19:15 |
| report.css | 2768 | 2021-04-29 16:19:15 |
| Show.js | 1085 | 2021-04-29 16:19:15 |