Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000876437-21-000012-index-headers.html | 2021-02-23 16:22:42 | |
| 0000876437-21-000012-index.html | 2021-02-23 16:22:42 | |
| 0000876437-21-000012.txt | 2021-02-23 16:22:42 | |
 0000876437-21-000012-xbrl.zip | 774062 | 2021-02-23 16:22:42 |
| FilingSummary.xml | 52076 | 2021-02-23 16:22:42 |
| Financial_Report.xlsx | 185243 | 2021-02-23 16:22:42 |
| MetaLinks.json | 969048 | 2021-02-23 16:22:42 |
| mtg-123120xex1012.htm | 10827 | 2021-02-23 16:22:42 |
| mtg-123120xex10224.htm | 57062 | 2021-02-23 16:22:42 |
| mtg-123120xex10241.htm | 10291 | 2021-02-23 16:22:42 |
| mtg-123120xex21.htm | 13134 | 2021-02-23 16:22:42 |
| mtg-123120xex23.htm | 2324 | 2021-02-23 16:22:42 |
| mtg-123120xex311.htm | 9413 | 2021-02-23 16:22:42 |
| mtg-123120xex312.htm | 9436 | 2021-02-23 16:22:42 |
| mtg-123120xex43.htm | 11790 | 2021-02-23 16:22:42 |
| mtg-20201231.htm | 5161001 | 2021-02-23 16:22:42 |
| mtg-20201231.xsd | 87599 | 2021-02-23 16:22:42 |
| mtg-20201231_cal.xml | 167200 | 2021-02-23 16:22:42 |
| mtg-20201231_def.xml | 540122 | 2021-02-23 16:22:42 |
 mtg-20201231_g1.jpg | 8257 | 2021-02-23 16:22:42 |
 mtg-20201231_g2.jpg | 52578 | 2021-02-23 16:22:42 |
 mtg-20201231_g3.jpg | 3047 | 2021-02-23 16:22:42 |
| mtg-20201231_htm.xml | 4109383 | 2021-02-23 16:22:42 |
| mtg-20201231_lab.xml | 1114100 | 2021-02-23 16:22:42 |
| mtg-20201231_pre.xml | 784871 | 2021-02-23 16:22:42 |
| mtg123120-ex32.htm | 4819 | 2021-02-23 16:22:42 |
| R1.htm | 65030 | 2021-02-23 16:22:42 |
| R10.htm | 67114 | 2021-02-23 16:22:42 |
| R11.htm | 34383 | 2021-02-23 16:22:42 |
| R12.htm | 190495 | 2021-02-23 16:22:42 |
| R13.htm | 130343 | 2021-02-23 16:22:42 |
| R14.htm | 31913 | 2021-02-23 16:22:42 |
| R15.htm | 100899 | 2021-02-23 16:22:42 |
| R16.htm | 110948 | 2021-02-23 16:22:42 |
| R17.htm | 71785 | 2021-02-23 16:22:42 |
| R18.htm | 298180 | 2021-02-23 16:22:42 |
| R19.htm | 54703 | 2021-02-23 16:22:42 |
| R2.htm | 79792 | 2021-02-23 16:22:42 |
| R20.htm | 9358 | 2021-02-23 16:22:42 |
| R21.htm | 33952 | 2021-02-23 16:22:42 |
| R22.htm | 18147 | 2021-02-23 16:22:42 |
| R23.htm | 13035 | 2021-02-23 16:22:42 |
| R24.htm | 11412 | 2021-02-23 16:22:42 |
| R25.htm | 75344 | 2021-02-23 16:22:42 |
| R26.htm | 32712 | 2021-02-23 16:22:42 |
| R27.htm | 125763 | 2021-02-23 16:22:42 |
| R28.htm | 18316 | 2021-02-23 16:22:42 |
| R29.htm | 76899 | 2021-02-23 16:22:42 |
| R3.htm | 18628 | 2021-02-23 16:22:42 |
| R30.htm | 13820 | 2021-02-23 16:22:42 |
| R31.htm | 33401 | 2021-02-23 16:22:42 |
| R32.htm | 191687 | 2021-02-23 16:22:42 |
| R33.htm | 121774 | 2021-02-23 16:22:42 |
| R34.htm | 14363 | 2021-02-23 16:22:42 |
| R35.htm | 89167 | 2021-02-23 16:22:42 |
| R36.htm | 104532 | 2021-02-23 16:22:42 |
| R37.htm | 73978 | 2021-02-23 16:22:42 |
| R38.htm | 312944 | 2021-02-23 16:22:42 |
| R39.htm | 56750 | 2021-02-23 16:22:42 |
| R4.htm | 65372 | 2021-02-23 16:22:42 |
| R40.htm | 23244 | 2021-02-23 16:22:42 |
| R41.htm | 13077 | 2021-02-23 16:22:42 |
| R42.htm | 11769 | 2021-02-23 16:22:42 |
| R43.htm | 74470 | 2021-02-23 16:22:42 |
| R44.htm | 5523 | 2021-02-23 16:22:42 |
| R45.htm | 22031 | 2021-02-23 16:22:42 |
| R46.htm | 49196 | 2021-02-23 16:22:42 |
| R47.htm | 191046 | 2021-02-23 16:22:42 |
| R48.htm | 24142 | 2021-02-23 16:22:42 |
| R49.htm | 9340 | 2021-02-23 16:22:42 |
| R5.htm | 22648 | 2021-02-23 16:22:42 |
| R50.htm | 85351 | 2021-02-23 16:22:42 |
| R51.htm | 19002 | 2021-02-23 16:22:42 |
| R52.htm | 34573 | 2021-02-23 16:22:42 |
| R53.htm | 21039 | 2021-02-23 16:22:42 |
| R54.htm | 100546 | 2021-02-23 16:22:42 |
| R55.htm | 26195 | 2021-02-23 16:22:42 |
| R56.htm | 30039 | 2021-02-23 16:22:42 |
| R57.htm | 12384 | 2021-02-23 16:22:42 |
| R58.htm | 13264 | 2021-02-23 16:22:42 |
| R59.htm | 20894 | 2021-02-23 16:22:42 |
| R6.htm | 47026 | 2021-02-23 16:22:42 |
| R60.htm | 28319 | 2021-02-23 16:22:42 |
| R61.htm | 61256 | 2021-02-23 16:22:42 |
| R62.htm | 28381 | 2021-02-23 16:22:42 |
| R63.htm | 12109 | 2021-02-23 16:22:42 |
| R64.htm | 14515 | 2021-02-23 16:22:42 |
| R65.htm | 10482 | 2021-02-23 16:22:42 |
| R66.htm | 88409 | 2021-02-23 16:22:42 |
| R67.htm | 39307 | 2021-02-23 16:22:42 |
| R68.htm | 17874 | 2021-02-23 16:22:42 |
| R69.htm | 18252 | 2021-02-23 16:22:42 |
| R7.htm | 88714 | 2021-02-23 16:22:42 |
| R70.htm | 33595 | 2021-02-23 16:22:42 |
| R71.htm | 26670 | 2021-02-23 16:22:42 |
| R72.htm | 25948 | 2021-02-23 16:22:42 |
| R73.htm | 36105 | 2021-02-23 16:22:42 |
| R74.htm | 48152 | 2021-02-23 16:22:42 |
| R75.htm | 46175 | 2021-02-23 16:22:42 |
| R76.htm | 36380 | 2021-02-23 16:22:42 |
| R77.htm | 82655 | 2021-02-23 16:22:42 |
| R78.htm | 18138 | 2021-02-23 16:22:42 |
| R79.htm | 49620 | 2021-02-23 16:22:42 |
| R8.htm | 8543 | 2021-02-23 16:22:42 |
| R80.htm | 8936 | 2021-02-23 16:22:42 |
| R81.htm | 8209 | 2021-02-23 16:22:42 |
| R82.htm | 60945 | 2021-02-23 16:22:42 |
| R83.htm | 22096 | 2021-02-23 16:22:42 |
| R84.htm | 5979 | 2021-02-23 16:22:42 |
| R85.htm | 39996 | 2021-02-23 16:22:42 |
| R86.htm | 41482 | 2021-02-23 16:22:42 |
| R87.htm | 246365 | 2021-02-23 16:22:42 |
| R88.htm | 24113 | 2021-02-23 16:22:42 |
| R89.htm | 16695 | 2021-02-23 16:22:42 |
| R9.htm | 9008 | 2021-02-23 16:22:42 |
| report.css | 2768 | 2021-02-23 16:22:42 |
| Show.js | 1086 | 2021-02-23 16:22:42 |