Document and Entity Information - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Mar. 09, 2016 |
Jun. 30, 2015 |
|
| Entity [Abstract] | |||
| Entity Registrant Name | National Storage Affiliates Trust | ||
| Entity Central Index Key | 0001618563 | ||
| Current Fiscal Year End Date | --12-31 | ||
| Entity Filer Category | Non-accelerated Filer | ||
| Document Type | 10-K | ||
| Document Period End Date | Dec. 31, 2015 | ||
| Document Fiscal Year Focus | 2015 | ||
| Document Fiscal Period Focus | FY | ||
| Amendment Flag | false | ||
| Entity Common Stock, Shares Outstanding | 23,015,751 | ||
| Entity Well-known Seasoned Issuer | No | ||
| Entity Voluntary Filers | No | ||
| Entity Current Reporting Status | Yes | ||
| Entity Public Float | $ 285.0 |