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 0001193125-18-037381-index-headers.html | 2018-02-09 10:56:24 | |
| 0001193125-18-037381-index.html | 2018-02-09 10:56:24 | |
| 0001193125-18-037381.txt | 2018-02-09 10:56:24 | |
 0001193125-18-037381-xbrl.zip | 77497 | 2018-02-09 10:56:24 |
| d490575d10q.htm | 430504 | 2018-02-09 10:56:24 |
| d490575dex102.htm | 175458 | 2018-02-09 10:56:24 |
| d490575dex311.htm | 10038 | 2018-02-09 10:56:24 |
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| d490575dex321.htm | 2459 | 2018-02-09 10:56:24 |
| d490575dex322.htm | 2514 | 2018-02-09 10:56:24 |
| FilingSummary.xml | 24280 | 2018-02-09 10:56:24 |
| Financial_Report.xlsx | 43515 | 2018-02-09 10:56:24 |
 g490575g14h12.jpg | 2638 | 2018-02-09 10:56:24 |
| nick-20171231.xml | 622192 | 2018-02-09 10:56:24 |
| nick-20171231.xsd | 32728 | 2018-02-09 10:56:24 |
| nick-20171231_cal.xml | 37293 | 2018-02-09 10:56:24 |
| nick-20171231_def.xml | 89059 | 2018-02-09 10:56:24 |
| nick-20171231_lab.xml | 274483 | 2018-02-09 10:56:24 |
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| R9.htm | 80336 | 2018-02-09 10:56:24 |
| report.css | 2767 | 2018-02-09 10:56:24 |
| Show.js | 1410 | 2018-02-09 10:56:24 |