Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001628280-17-001690-index-headers.html | 2017-02-24 12:18:20 | |
| 0001628280-17-001690-index.html | 2017-02-24 12:18:20 | |
| 0001628280-17-001690.txt | 2017-02-24 12:18:20 | |
 0001628280-17-001690-xbrl.zip | 566168 | 2017-02-24 12:18:20 |
| aci-20161231.xml | 5623886 | 2017-02-24 12:18:20 |
| aci-20161231.xsd | 120649 | 2017-02-24 12:18:20 |
| aci-20161231x10k.htm | 3852442 | 2017-02-24 12:18:20 |
| aci-20161231xex211.htm | 23378 | 2017-02-24 12:18:20 |
| aci-20161231xex231.htm | 2337 | 2017-02-24 12:18:20 |
| aci-20161231xex232.htm | 7341 | 2017-02-24 12:18:20 |
| aci-20161231xex241.htm | 10691 | 2017-02-24 12:18:20 |
| aci-20161231xex311.htm | 12791 | 2017-02-24 12:18:20 |
| aci-20161231xex312.htm | 13418 | 2017-02-24 12:18:20 |
| aci-20161231xex321.htm | 5975 | 2017-02-24 12:18:20 |
| aci-20161231xex322.htm | 6286 | 2017-02-24 12:18:20 |
| aci-20161231xex95.htm | 211322 | 2017-02-24 12:18:20 |
| aci-20161231_cal.xml | 258566 | 2017-02-24 12:18:20 |
| aci-20161231_def.xml | 913955 | 2017-02-24 12:18:20 |
| aci-20161231_lab.xml | 1544073 | 2017-02-24 12:18:20 |
| aci-20161231_pre.xml | 1064323 | 2017-02-24 12:18:20 |
| FilingSummary.xml | 74255 | 2017-02-24 12:18:20 |
| Financial_Report.xlsx | 193754 | 2017-02-24 12:18:20 |
 image0a09.jpg | 4696 | 2017-02-24 12:18:20 |
 longwallmininga03.jpg | 62941 | 2017-02-24 12:18:20 |
| R1.htm | 28395 | 2017-02-24 12:18:20 |
| R10.htm | 61565 | 2017-02-24 12:18:20 |
| R100.htm | 35088 | 2017-02-24 12:18:20 |
| R101.htm | 24575 | 2017-02-24 12:18:20 |
| R102.htm | 27967 | 2017-02-24 12:18:20 |
| R103.htm | 46047 | 2017-02-24 12:18:20 |
| R104.htm | 23794 | 2017-02-24 12:18:20 |
| R105.htm | 12958 | 2017-02-24 12:18:20 |
| R106.htm | 32030 | 2017-02-24 12:18:20 |
| R107.htm | 27689 | 2017-02-24 12:18:20 |
| R108.htm | 34607 | 2017-02-24 12:18:20 |
| R109.htm | 28884 | 2017-02-24 12:18:20 |
| R11.htm | 302791 | 2017-02-24 12:18:20 |
| R110.htm | 107679 | 2017-02-24 12:18:20 |
| R111.htm | 44265 | 2017-02-24 12:18:20 |
| R112.htm | 13521 | 2017-02-24 12:18:20 |
| R113.htm | 23843 | 2017-02-24 12:18:20 |
| R114.htm | 53157 | 2017-02-24 12:18:20 |
| R115.htm | 22023 | 2017-02-24 12:18:20 |
| R116.htm | 30255 | 2017-02-24 12:18:20 |
| R117.htm | 13347 | 2017-02-24 12:18:20 |
| R118.htm | 24467 | 2017-02-24 12:18:20 |
| R119.htm | 23246 | 2017-02-24 12:18:20 |
| R12.htm | 119688 | 2017-02-24 12:18:20 |
| R120.htm | 26318 | 2017-02-24 12:18:20 |
| R121.htm | 12498 | 2017-02-24 12:18:20 |
| R122.htm | 78705 | 2017-02-24 12:18:20 |
| R123.htm | 47207 | 2017-02-24 12:18:20 |
| R124.htm | 34698 | 2017-02-24 12:18:20 |
| R125.htm | 33375 | 2017-02-24 12:18:20 |
| R13.htm | 43107 | 2017-02-24 12:18:20 |
| R14.htm | 10827 | 2017-02-24 12:18:20 |
| R15.htm | 16202 | 2017-02-24 12:18:20 |
| R16.htm | 84780 | 2017-02-24 12:18:20 |
| R17.htm | 111264 | 2017-02-24 12:18:20 |
| R18.htm | 44639 | 2017-02-24 12:18:20 |
| R19.htm | 192477 | 2017-02-24 12:18:20 |
| R2.htm | 85956 | 2017-02-24 12:18:20 |
| R20.htm | 22333 | 2017-02-24 12:18:20 |
| R21.htm | 55134 | 2017-02-24 12:18:20 |
| R22.htm | 124981 | 2017-02-24 12:18:20 |
| R23.htm | 30278 | 2017-02-24 12:18:20 |
| R24.htm | 99413 | 2017-02-24 12:18:20 |
| R25.htm | 17852 | 2017-02-24 12:18:20 |
| R26.htm | 27826 | 2017-02-24 12:18:20 |
| R27.htm | 78371 | 2017-02-24 12:18:20 |
| R28.htm | 370067 | 2017-02-24 12:18:20 |
| R29.htm | 21354 | 2017-02-24 12:18:20 |
| R3.htm | 46542 | 2017-02-24 12:18:20 |
| R30.htm | 26571 | 2017-02-24 12:18:20 |
| R31.htm | 37438 | 2017-02-24 12:18:20 |
| R32.htm | 9722 | 2017-02-24 12:18:20 |
| R33.htm | 180899 | 2017-02-24 12:18:20 |
| R34.htm | 83960 | 2017-02-24 12:18:20 |
| R35.htm | 94552 | 2017-02-24 12:18:20 |
| R36.htm | 120412 | 2017-02-24 12:18:20 |
| R37.htm | 19523 | 2017-02-24 12:18:20 |
| R38.htm | 253818 | 2017-02-24 12:18:20 |
| R39.htm | 117840 | 2017-02-24 12:18:20 |
| R4.htm | 126343 | 2017-02-24 12:18:20 |
| R40.htm | 34113 | 2017-02-24 12:18:20 |
| R41.htm | 15402 | 2017-02-24 12:18:20 |
| R42.htm | 80989 | 2017-02-24 12:18:20 |
| R43.htm | 105193 | 2017-02-24 12:18:20 |
| R44.htm | 42622 | 2017-02-24 12:18:20 |
| R45.htm | 182347 | 2017-02-24 12:18:20 |
| R46.htm | 21635 | 2017-02-24 12:18:20 |
| R47.htm | 38092 | 2017-02-24 12:18:20 |
| R48.htm | 118382 | 2017-02-24 12:18:20 |
| R49.htm | 27752 | 2017-02-24 12:18:20 |
| R5.htm | 13327 | 2017-02-24 12:18:20 |
| R50.htm | 91996 | 2017-02-24 12:18:20 |
| R51.htm | 13834 | 2017-02-24 12:18:20 |
| R52.htm | 79052 | 2017-02-24 12:18:20 |
| R53.htm | 364430 | 2017-02-24 12:18:20 |
| R54.htm | 19096 | 2017-02-24 12:18:20 |
| R55.htm | 21824 | 2017-02-24 12:18:20 |
| R56.htm | 29043 | 2017-02-24 12:18:20 |
| R57.htm | 175528 | 2017-02-24 12:18:20 |
| R58.htm | 82962 | 2017-02-24 12:18:20 |
| R59.htm | 23870 | 2017-02-24 12:18:20 |
| R6.htm | 135244 | 2017-02-24 12:18:20 |
| R60.htm | 16743 | 2017-02-24 12:18:20 |
| R61.htm | 33234 | 2017-02-24 12:18:20 |
| R62.htm | 15972 | 2017-02-24 12:18:20 |
| R63.htm | 51669 | 2017-02-24 12:18:20 |
| R64.htm | 240454 | 2017-02-24 12:18:20 |
| R65.htm | 15334 | 2017-02-24 12:18:20 |
| R66.htm | 13827 | 2017-02-24 12:18:20 |
| R67.htm | 41609 | 2017-02-24 12:18:20 |
| R68.htm | 15711 | 2017-02-24 12:18:20 |
| R69.htm | 71818 | 2017-02-24 12:18:20 |
| R7.htm | 42604 | 2017-02-24 12:18:20 |
| R70.htm | 25930 | 2017-02-24 12:18:20 |
| R71.htm | 39717 | 2017-02-24 12:18:20 |
| R72.htm | 64218 | 2017-02-24 12:18:20 |
| R73.htm | 41919 | 2017-02-24 12:18:20 |
| R74.htm | 37541 | 2017-02-24 12:18:20 |
| R75.htm | 11746 | 2017-02-24 12:18:20 |
| R76.htm | 16616 | 2017-02-24 12:18:20 |
| R77.htm | 59243 | 2017-02-24 12:18:20 |
| R78.htm | 7552 | 2017-02-24 12:18:20 |
| R79.htm | 16968 | 2017-02-24 12:18:20 |
| R8.htm | 6956 | 2017-02-24 12:18:20 |
| R80.htm | 64893 | 2017-02-24 12:18:20 |
| R81.htm | 13410 | 2017-02-24 12:18:20 |
| R82.htm | 43655 | 2017-02-24 12:18:20 |
| R83.htm | 30466 | 2017-02-24 12:18:20 |
| R84.htm | 12884 | 2017-02-24 12:18:20 |
| R85.htm | 50276 | 2017-02-24 12:18:20 |
| R86.htm | 19668 | 2017-02-24 12:18:20 |
| R87.htm | 44636 | 2017-02-24 12:18:20 |
| R88.htm | 28277 | 2017-02-24 12:18:20 |
| R89.htm | 63296 | 2017-02-24 12:18:20 |
| R9.htm | 13239 | 2017-02-24 12:18:20 |
| R90.htm | 54245 | 2017-02-24 12:18:20 |
| R91.htm | 53215 | 2017-02-24 12:18:20 |
| R92.htm | 35083 | 2017-02-24 12:18:20 |
| R93.htm | 30988 | 2017-02-24 12:18:20 |
| R94.htm | 30020 | 2017-02-24 12:18:20 |
| R95.htm | 64196 | 2017-02-24 12:18:20 |
| R96.htm | 12006 | 2017-02-24 12:18:20 |
| R97.htm | 9596 | 2017-02-24 12:18:20 |
| R98.htm | 28566 | 2017-02-24 12:18:20 |
| R99.htm | 9289 | 2017-02-24 12:18:20 |
| report.css | 2768 | 2017-02-24 12:18:20 |
 roomandpillara08.jpg | 68665 | 2017-02-24 12:18:20 |
| Show.js | 1411 | 2017-02-24 12:18:20 |
 stockperformancecharta02.jpg | 70906 | 2017-02-24 12:18:20 |
 surfacemininga03.jpg | 60118 | 2017-02-24 12:18:20 |