Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001628280-26-012248-index-headers.html | 2026-02-26 16:07:07 | |
| 0001628280-26-012248-index.html | 2026-02-26 16:07:07 | |
| 0001628280-26-012248.txt | 2026-02-26 16:07:07 | |
 0001628280-26-012248-xbrl.zip | 555769 | 2026-02-26 16:07:07 |
| ex211q42025listofsubsidiar.htm | 240872 | 2026-02-26 16:07:07 |
| ex231consentofkpmgllpforna.htm | 2082 | 2026-02-26 16:07:07 |
| ex311ceocertificationq425.htm | 10045 | 2026-02-26 16:07:07 |
| ex312cfocertificationq425.htm | 9942 | 2026-02-26 16:07:07 |
| ex32118uscceoandcfocertifi.htm | 8163 | 2026-02-26 16:07:07 |
| exhibit107-secondamendme.htm | 20672 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme001.jpg | 249355 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme002.jpg | 291194 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme003.jpg | 292037 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme004.jpg | 199476 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme005.jpg | 68697 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme006.jpg | 134381 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme007.jpg | 83357 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme008.jpg | 107308 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme009.jpg | 67425 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme010.jpg | 41706 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme011.jpg | 38506 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme012.jpg | 42987 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme013.jpg | 40206 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme014.jpg | 37902 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme015.jpg | 44363 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme016.jpg | 39506 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme017.jpg | 43725 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme018.jpg | 47955 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme019.jpg | 37133 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme020.jpg | 37408 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme021.jpg | 40978 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme022.jpg | 41814 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme023.jpg | 42167 | 2026-02-26 16:07:07 |
 exhibit107-secondamendme024.jpg | 36259 | 2026-02-26 16:07:07 |
| FilingSummary.xml | 49698 | 2026-02-26 16:07:07 |
| MetaLinks.json | 1369576 | 2026-02-26 16:07:07 |
| nsa-20251231.htm | 2686380 | 2026-02-26 16:07:07 |
| nsa-20251231.xsd | 89785 | 2026-02-26 16:07:07 |
| nsa-20251231_cal.xml | 119641 | 2026-02-26 16:07:07 |
| nsa-20251231_def.xml | 554246 | 2026-02-26 16:07:07 |
 nsa-20251231_g1.jpg | 142883 | 2026-02-26 16:07:07 |
| nsa-20251231_htm.xml | 1992967 | 2026-02-26 16:07:07 |
| nsa-20251231_lab.xml | 1058792 | 2026-02-26 16:07:07 |
| nsa-20251231_pre.xml | 815723 | 2026-02-26 16:07:07 |
| R1.htm | 72730 | 2026-02-26 16:07:07 |
| R10.htm | 49951 | 2026-02-26 16:07:07 |
| R11.htm | 31223 | 2026-02-26 16:07:07 |
| R12.htm | 14807 | 2026-02-26 16:07:07 |
| R13.htm | 39254 | 2026-02-26 16:07:07 |
| R14.htm | 48121 | 2026-02-26 16:07:07 |
| R15.htm | 29384 | 2026-02-26 16:07:07 |
| R16.htm | 108992 | 2026-02-26 16:07:07 |
| R17.htm | 103628 | 2026-02-26 16:07:07 |
| R18.htm | 45976 | 2026-02-26 16:07:07 |
| R19.htm | 12990 | 2026-02-26 16:07:07 |
| R2.htm | 7774 | 2026-02-26 16:07:07 |
| R20.htm | 6116 | 2026-02-26 16:07:07 |
| R21.htm | 38507 | 2026-02-26 16:07:07 |
| R22.htm | 44106 | 2026-02-26 16:07:07 |
| R23.htm | 72001 | 2026-02-26 16:07:07 |
| R24.htm | 5296 | 2026-02-26 16:07:07 |
| R25.htm | 181732 | 2026-02-26 16:07:07 |
| R26.htm | 181684 | 2026-02-26 16:07:07 |
| R27.htm | 8465 | 2026-02-26 16:07:07 |
| R28.htm | 4371 | 2026-02-26 16:07:07 |
| R29.htm | 60176 | 2026-02-26 16:07:07 |
| R3.htm | 126871 | 2026-02-26 16:07:07 |
| R30.htm | 117817 | 2026-02-26 16:07:07 |
| R31.htm | 11902 | 2026-02-26 16:07:07 |
| R32.htm | 13373 | 2026-02-26 16:07:07 |
| R33.htm | 33638 | 2026-02-26 16:07:07 |
| R34.htm | 42861 | 2026-02-26 16:07:07 |
| R35.htm | 29875 | 2026-02-26 16:07:07 |
| R36.htm | 65377 | 2026-02-26 16:07:07 |
| R37.htm | 93894 | 2026-02-26 16:07:07 |
| R38.htm | 40976 | 2026-02-26 16:07:07 |
| R39.htm | 36873 | 2026-02-26 16:07:07 |
| R4.htm | 22348 | 2026-02-26 16:07:07 |
| R40.htm | 35107 | 2026-02-26 16:07:07 |
| R41.htm | 67768 | 2026-02-26 16:07:07 |
| R42.htm | 36332 | 2026-02-26 16:07:07 |
| R43.htm | 108755 | 2026-02-26 16:07:07 |
| R44.htm | 130408 | 2026-02-26 16:07:07 |
| R45.htm | 15034 | 2026-02-26 16:07:07 |
| R46.htm | 17645 | 2026-02-26 16:07:07 |
| R47.htm | 40639 | 2026-02-26 16:07:07 |
| R48.htm | 61840 | 2026-02-26 16:07:07 |
| R49.htm | 54032 | 2026-02-26 16:07:07 |
| R5.htm | 138302 | 2026-02-26 16:07:07 |
| R50.htm | 46729 | 2026-02-26 16:07:07 |
| R51.htm | 15462 | 2026-02-26 16:07:07 |
| R52.htm | 59468 | 2026-02-26 16:07:07 |
| R53.htm | 24782 | 2026-02-26 16:07:07 |
| R54.htm | 20211 | 2026-02-26 16:07:07 |
| R55.htm | 123822 | 2026-02-26 16:07:07 |
| R56.htm | 318180 | 2026-02-26 16:07:07 |
| R57.htm | 52458 | 2026-02-26 16:07:07 |
| R58.htm | 96159 | 2026-02-26 16:07:07 |
| R59.htm | 25835 | 2026-02-26 16:07:07 |
| R6.htm | 42377 | 2026-02-26 16:07:07 |
| R60.htm | 37510 | 2026-02-26 16:07:07 |
| R61.htm | 10629 | 2026-02-26 16:07:07 |
| R62.htm | 12256 | 2026-02-26 16:07:07 |
| R63.htm | 25006 | 2026-02-26 16:07:07 |
| R64.htm | 82705 | 2026-02-26 16:07:07 |
| R65.htm | 18360 | 2026-02-26 16:07:07 |
| R66.htm | 60188 | 2026-02-26 16:07:07 |
| R67.htm | 20794 | 2026-02-26 16:07:07 |
| R68.htm | 13157 | 2026-02-26 16:07:07 |
| R69.htm | 40091 | 2026-02-26 16:07:07 |
| R7.htm | 130630 | 2026-02-26 16:07:07 |
| R70.htm | 28139 | 2026-02-26 16:07:07 |
| R71.htm | 25799 | 2026-02-26 16:07:07 |
| R72.htm | 15258 | 2026-02-26 16:07:07 |
| R73.htm | 7511 | 2026-02-26 16:07:07 |
| R74.htm | 37720 | 2026-02-26 16:07:07 |
| R75.htm | 33123 | 2026-02-26 16:07:07 |
| R76.htm | 51066 | 2026-02-26 16:07:07 |
| R77.htm | 23194 | 2026-02-26 16:07:07 |
| R78.htm | 295702 | 2026-02-26 16:07:07 |
| R79.htm | 24910 | 2026-02-26 16:07:07 |
| R8.htm | 114706 | 2026-02-26 16:07:07 |
| R9.htm | 9607 | 2026-02-26 16:07:07 |
| report.css | 2768 | 2026-02-26 16:07:07 |
| Show.js | 1086 | 2026-02-26 16:07:07 |