Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-17-038250-index-headers.html | 2017-02-10 16:11:03 | |
| 0001193125-17-038250-index.html | 2017-02-10 16:11:03 | |
| 0001193125-17-038250.txt | 2017-02-10 16:11:03 | |
 0001193125-17-038250-xbrl.zip | 197864 | 2017-02-10 16:11:03 |
| d323709d10k.htm | 1318828 | 2017-02-10 16:11:03 |
| d323709dex211.htm | 7119 | 2017-02-10 16:11:03 |
| d323709dex231.htm | 2101 | 2017-02-10 16:11:03 |
| d323709dex311.htm | 10128 | 2017-02-10 16:11:03 |
| d323709dex312.htm | 9974 | 2017-02-10 16:11:03 |
| d323709dex32.htm | 3759 | 2017-02-10 16:11:03 |
| FilingSummary.xml | 51658 | 2017-02-10 16:11:03 |
| Financial_Report.xlsx | 103828 | 2017-02-10 16:11:03 |
 g323709g57x57.jpg | 67801 | 2017-02-10 16:11:03 |
| md-20161231.xml | 1574002 | 2017-02-10 16:11:03 |
| md-20161231.xsd | 69400 | 2017-02-10 16:11:03 |
| md-20161231_cal.xml | 115347 | 2017-02-10 16:11:03 |
| md-20161231_def.xml | 193263 | 2017-02-10 16:11:03 |
| md-20161231_lab.xml | 597378 | 2017-02-10 16:11:03 |
| md-20161231_pre.xml | 413293 | 2017-02-10 16:11:03 |
| R1.htm | 29960 | 2017-02-10 16:11:03 |
| R10.htm | 26923 | 2017-02-10 16:11:03 |
| R11.htm | 16650 | 2017-02-10 16:11:03 |
| R12.htm | 44876 | 2017-02-10 16:11:03 |
| R13.htm | 37597 | 2017-02-10 16:11:03 |
| R14.htm | 17478 | 2017-02-10 16:11:03 |
| R15.htm | 29644 | 2017-02-10 16:11:03 |
| R16.htm | 57400 | 2017-02-10 16:11:03 |
| R17.htm | 81691 | 2017-02-10 16:11:03 |
| R18.htm | 16961 | 2017-02-10 16:11:03 |
| R19.htm | 34860 | 2017-02-10 16:11:03 |
| R2.htm | 81029 | 2017-02-10 16:11:03 |
| R20.htm | 12594 | 2017-02-10 16:11:03 |
| R21.htm | 7216 | 2017-02-10 16:11:03 |
| R22.htm | 17376 | 2017-02-10 16:11:03 |
| R23.htm | 113267 | 2017-02-10 16:11:03 |
| R24.htm | 16443 | 2017-02-10 16:11:03 |
| R25.htm | 116585 | 2017-02-10 16:11:03 |
| R26.htm | 20066 | 2017-02-10 16:11:03 |
| R27.htm | 20888 | 2017-02-10 16:11:03 |
| R28.htm | 23031 | 2017-02-10 16:11:03 |
| R29.htm | 11378 | 2017-02-10 16:11:03 |
| R3.htm | 16892 | 2017-02-10 16:11:03 |
| R30.htm | 34452 | 2017-02-10 16:11:03 |
| R31.htm | 23763 | 2017-02-10 16:11:03 |
| R32.htm | 12651 | 2017-02-10 16:11:03 |
| R33.htm | 24342 | 2017-02-10 16:11:03 |
| R34.htm | 38363 | 2017-02-10 16:11:03 |
| R35.htm | 63866 | 2017-02-10 16:11:03 |
| R36.htm | 12381 | 2017-02-10 16:11:03 |
| R37.htm | 25518 | 2017-02-10 16:11:03 |
| R38.htm | 8883 | 2017-02-10 16:11:03 |
| R39.htm | 112602 | 2017-02-10 16:11:03 |
| R4.htm | 65720 | 2017-02-10 16:11:03 |
| R40.htm | 5384 | 2017-02-10 16:11:03 |
| R41.htm | 56629 | 2017-02-10 16:11:03 |
| R42.htm | 20821 | 2017-02-10 16:11:03 |
| R43.htm | 14295 | 2017-02-10 16:11:03 |
| R44.htm | 10150 | 2017-02-10 16:11:03 |
| R45.htm | 9734 | 2017-02-10 16:11:03 |
| R46.htm | 11788 | 2017-02-10 16:11:03 |
| R47.htm | 8733 | 2017-02-10 16:11:03 |
| R48.htm | 16507 | 2017-02-10 16:11:03 |
| R49.htm | 13033 | 2017-02-10 16:11:03 |
| R5.htm | 72660 | 2017-02-10 16:11:03 |
| R50.htm | 63894 | 2017-02-10 16:11:03 |
| R51.htm | 34938 | 2017-02-10 16:11:03 |
| R52.htm | 14453 | 2017-02-10 16:11:03 |
| R53.htm | 26628 | 2017-02-10 16:11:03 |
| R54.htm | 19835 | 2017-02-10 16:11:03 |
| R55.htm | 13715 | 2017-02-10 16:11:03 |
| R56.htm | 22870 | 2017-02-10 16:11:03 |
| R57.htm | 8579 | 2017-02-10 16:11:03 |
| R58.htm | 19136 | 2017-02-10 16:11:03 |
| R59.htm | 73143 | 2017-02-10 16:11:03 |
| R6.htm | 105793 | 2017-02-10 16:11:03 |
| R60.htm | 28726 | 2017-02-10 16:11:03 |
| R61.htm | 14873 | 2017-02-10 16:11:03 |
| R62.htm | 10694 | 2017-02-10 16:11:03 |
| R63.htm | 12669 | 2017-02-10 16:11:03 |
| R64.htm | 24956 | 2017-02-10 16:11:03 |
| R65.htm | 52545 | 2017-02-10 16:11:03 |
| R66.htm | 21498 | 2017-02-10 16:11:03 |
| R67.htm | 37041 | 2017-02-10 16:11:03 |
| R68.htm | 15757 | 2017-02-10 16:11:03 |
| R69.htm | 15450 | 2017-02-10 16:11:03 |
| R7.htm | 8171 | 2017-02-10 16:11:03 |
| R70.htm | 54351 | 2017-02-10 16:11:03 |
| R71.htm | 22940 | 2017-02-10 16:11:03 |
| R72.htm | 29598 | 2017-02-10 16:11:03 |
| R73.htm | 24661 | 2017-02-10 16:11:03 |
| R74.htm | 4622 | 2017-02-10 16:11:03 |
| R75.htm | 4444 | 2017-02-10 16:11:03 |
| R76.htm | 19427 | 2017-02-10 16:11:03 |
| R77.htm | 60444 | 2017-02-10 16:11:03 |
| R78.htm | 9651 | 2017-02-10 16:11:03 |
| R8.htm | 74471 | 2017-02-10 16:11:03 |
| R9.htm | 26311 | 2017-02-10 16:11:03 |
| report.css | 2767 | 2017-02-10 16:11:03 |
| Show.js | 1410 | 2017-02-10 16:11:03 |