Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000070145-13-000018-index-headers.html | 2013-02-08 14:26:20 | |
| 0000070145-13-000018-index.html | 2013-02-08 14:26:20 | |
| 0000070145-13-000018.txt | 2013-02-08 14:26:20 | |
 0000070145-13-000018-xbrl.zip | 142530 | 2013-02-08 14:26:20 |
| FilingSummary.xml | 25143 | 2013-02-08 14:26:20 |
| Financial_Report.xls | 1231558 | 2013-02-08 14:26:20 |
| nfg-20121231.xml | 1357130 | 2013-02-08 14:26:20 |
| nfg-20121231.xsd | 50556 | 2013-02-08 14:26:20 |
| nfg-20121231ex101f88ac7.htm | 8656 | 2013-02-08 14:26:20 |
| nfg-20121231ex1025b852f.htm | 63205 | 2013-02-08 14:26:20 |
| nfg-20121231ex103c6ab88.htm | 271496 | 2013-02-08 14:26:20 |
| nfg-20121231ex12825d315.htm | 85121 | 2013-02-08 14:26:20 |
| nfg-20121231ex311069886.htm | 16828 | 2013-02-08 14:26:20 |
| nfg-20121231ex312a3f119.htm | 17234 | 2013-02-08 14:26:20 |
| nfg-20121231x10q.htm | 1293720 | 2013-02-08 14:26:20 |
| nfg-20121231xex32.htm | 18032 | 2013-02-08 14:26:20 |
| nfg-20121231xex99.htm | 63244 | 2013-02-08 14:26:20 |
| nfg-20121231_cal.xml | 83271 | 2013-02-08 14:26:20 |
| nfg-20121231_def.xml | 127435 | 2013-02-08 14:26:20 |
| nfg-20121231_lab.xml | 409552 | 2013-02-08 14:26:20 |
| nfg-20121231_pre.xml | 291641 | 2013-02-08 14:26:20 |
| R1.htm | 28846 | 2013-02-08 14:26:20 |
| R10.htm | 117234 | 2013-02-08 14:26:20 |
| R11.htm | 96568 | 2013-02-08 14:26:20 |
| R12.htm | 10099 | 2013-02-08 14:26:20 |
| R13.htm | 15501 | 2013-02-08 14:26:20 |
| R14.htm | 58665 | 2013-02-08 14:26:20 |
| R15.htm | 54612 | 2013-02-08 14:26:20 |
| R16.htm | 115417 | 2013-02-08 14:26:20 |
| R17.htm | 49803 | 2013-02-08 14:26:20 |
| R18.htm | 144880 | 2013-02-08 14:26:20 |
| R19.htm | 85748 | 2013-02-08 14:26:20 |
| R2.htm | 89496 | 2013-02-08 14:26:20 |
| R20.htm | 85603 | 2013-02-08 14:26:20 |
| R21.htm | 50410 | 2013-02-08 14:26:20 |
| R22.htm | 44387 | 2013-02-08 14:26:20 |
| R23.htm | 62872 | 2013-02-08 14:26:20 |
| R24.htm | 6540 | 2013-02-08 14:26:20 |
| R25.htm | 23748 | 2013-02-08 14:26:20 |
| R26.htm | 25206 | 2013-02-08 14:26:20 |
| R27.htm | 23375 | 2013-02-08 14:26:20 |
| R28.htm | 25775 | 2013-02-08 14:26:20 |
| R29.htm | 99204 | 2013-02-08 14:26:20 |
| R3.htm | 5665 | 2013-02-08 14:26:20 |
| R30.htm | 17789 | 2013-02-08 14:26:20 |
| R31.htm | 77869 | 2013-02-08 14:26:20 |
| R32.htm | 10002 | 2013-02-08 14:26:20 |
| R33.htm | 26066 | 2013-02-08 14:26:20 |
| R34.htm | 12598 | 2013-02-08 14:26:20 |
| R35.htm | 11345 | 2013-02-08 14:26:20 |
| R36.htm | 33889 | 2013-02-08 14:26:20 |
| R37.htm | 22229 | 2013-02-08 14:26:20 |
| R38.htm | 41105 | 2013-02-08 14:26:20 |
| R39.htm | 25402 | 2013-02-08 14:26:20 |
| R4.htm | 59301 | 2013-02-08 14:26:20 |
| R40.htm | 14612 | 2013-02-08 14:26:20 |
| R41.htm | 7726 | 2013-02-08 14:26:20 |
| R42.htm | 28975 | 2013-02-08 14:26:20 |
| R43.htm | 13224 | 2013-02-08 14:26:20 |
| R44.htm | 40337 | 2013-02-08 14:26:20 |
| R5.htm | 200852 | 2013-02-08 14:26:20 |
| R6.htm | 19446 | 2013-02-08 14:26:20 |
| R7.htm | 112374 | 2013-02-08 14:26:20 |
| R8.htm | 72080 | 2013-02-08 14:26:20 |
| R9.htm | 158102 | 2013-02-08 14:26:20 |
| report.css | 2721 | 2013-02-08 14:26:20 |
| Show.js | 6423 | 2013-02-08 14:26:20 |