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Debt - Narrative (Details) |  |  |  |  | 3 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 01, 2024 USD ($) | Jul. 03, 2023 USD ($) tenant | Jun. 15, 2023 USD ($) | Aug. 11, 2022 USD ($) | Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) | Nov. 28, 2023 | Jan. 27, 2023 derivative | Jan. 26, 2023 derivative | Sep. 01, 2022 | Dec. 31, 2019 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, gross |  |  |  |  | $ 708,322,000 |  | $ 613,361,000 |  |  |  |  |
Unamortized deferred financing costs |  |  |  |  | 1,757,000 |  | 1,942,000 |  |  |  |  |
Number of derivatives | derivative |  |  |  |  |  |  |  |  | 4 | 4 |  |
Proceeds under revolving credit facilities |  |  |  |  | 82,000,000 | $ 99,000,000 |  |  |  |  |  |
Revolving credit facility | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Facility fees |  |  |  |  | $ 200,000 |  |  |  |  |  |  |
Credit Facility | Term Loan |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Weighted average effective interest rate (as a percent) |  |  |  |  | 6.69% | 5.77% |  |  |  |  |  |
Credit Facility | Revolving credit facility | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Weighted average effective interest rate (as a percent) |  |  |  |  | 6.54% | 5.86% |  |  |  |  |  |
2028 Term Loan | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Deferred financing costs, gross (less than) |  |  |  | $ 3,800,000 |  |  |  |  |  |  |  |
2028 Term Loan | Revolving credit facility | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  | 400,000,000 |  |  |  |  |  |  |  |
Available increase |  |  |  | $ 800,000,000 |  |  |  |  |  |  |  |
Long-term debt, gross |  |  |  |  | $ 75,000,000 |  | 80,000,000 |  |  |  |  |
Debt instrument, extension term |  |  |  | 1 year |  |  |  |  |  |  |  |
Rate reduction |  |  |  | 0.025% |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  | 6.42% |  |  |  |  |  |  |
Deferred financing costs, gross (less than) |  |  |  | $ 2,400,000 |  |  |  |  |  |  |  |
Increase limit |  |  |  | 400,000,000 |  |  |  |  |  |  |  |
2028 Term Loan | Term loans | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 200,000,000 |  |  |  |  |  |  |  |
Long-term debt, gross |  |  |  |  | $ 200,000,000 |  | 200,000,000 |  |  |  |  |
Debt instrument, extension term |  |  |  | 1 year |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  | 3.88% |  |  |  |  |  |  |
Deferred financing costs, gross (less than) |  |  |  | $ 1,300,000 |  |  |  |  |  |  |  |
Hedged fixed rate |  |  |  |  |  |  |  |  |  |  | 2.63% |
2028 Term Loan | Minimum | Revolving credit facility | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revolver facility fee (as a percent) |  |  |  | 0.15% |  |  |  |  |  |  |  |
2028 Term Loan | Minimum | Revolving credit facility | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revolver facility fee (as a percent) |  |  |  | 0.125% |  |  |  |  |  |  |  |
2028 Term Loan | Maximum | Revolving credit facility | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revolver facility fee (as a percent) |  |  |  | 0.30% |  |  |  |  |  |  |  |
2028 Term Loan | Maximum | Revolving credit facility | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revolver facility fee (as a percent) |  |  |  | 0.30% |  |  |  |  |  |  |  |
2028 Term Loan | SOFR rate | Minimum | Revolving credit facility | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 1.00% |  |  |  |  |  |  |  |
2028 Term Loan | SOFR rate | Minimum | Revolving credit facility | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 0.725% |  |  |  |  |  |  |  |
2028 Term Loan | SOFR rate | Minimum | Term loans | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 1.15% |  |  |  |  |  |  |  |
2028 Term Loan | SOFR rate | Minimum | Term loans | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 0.80% |  |  |  |  |  |  |  |
2028 Term Loan | SOFR rate | Maximum | Revolving credit facility | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 1.45% |  |  |  |  |  |  |  |
2028 Term Loan | SOFR rate | Maximum | Revolving credit facility | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 1.40% |  |  |  |  |  |  |  |
2028 Term Loan | SOFR rate | Maximum | Term loans | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 1.60% |  |  |  |  |  |  |  |
2028 Term Loan | SOFR rate | Maximum | Term loans | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 1.60% |  |  |  |  |  |  |  |
2028 Term Loan | Base Rate | Minimum | Revolving credit facility | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 0.00% |  |  |  |  |  |  |  |
2028 Term Loan | Base Rate | Minimum | Term loans | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 0.15% |  |  |  |  |  |  |  |
2028 Term Loan | Base Rate | Minimum | Term loans | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 0.00% |  |  |  |  |  |  |  |
2028 Term Loan | Base Rate | Maximum | Revolving credit facility | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 0.45% |  |  |  |  |  |  |  |
2028 Term Loan | Base Rate | Maximum | Revolving credit facility | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 0.40% |  |  |  |  |  |  |  |
2028 Term Loan | Base Rate | Maximum | Term loans | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 0.60% |  |  |  |  |  |  |  |
2028 Term Loan | Base Rate | Maximum | Term loans | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 0.60% |  |  |  |  |  |  |  |
2028 Term Loan | SOFR adjustment rate | Revolving credit facility | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 0.10% |  |  |  |  |  |  |  |
2028 Term Loan | SOFR adjustment rate | Revolving credit facility | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 0.10% |  |  |  |  |  |  |  |
2028 Term Loan | SOFR adjustment rate | Term loans | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 0.10% |  |  |  |  |  |  |  |
2028 Term Loan | SOFR adjustment rate | Term loans | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  | 0.10% |  |  |  |  |  |  |  |
2028 Term Loan | SOFR rate | Term loans | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Weighted average effective interest rate (as a percent) |  |  |  |  | 5.33% |  |  |  |  |  |  |
2028 Term Loan | SOFR adjustment | Revolving credit facility | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  |  | 0.10% |  |  |  |  |  |  |
2028 Term Loan | SOFR adjustment | Term loans | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  |  | 0.10% |  |  |  |  |  |  |
2027 Term Loan | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Unamortized deferred financing costs |  |  |  | $ 500,000 |  |  |  |  |  |  |  |
2027 Term Loan | Term loans | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | $ 175,000,000 |  |  |  |  |  |  |  |  | $ 175,000,000
Long-term debt, gross |  |  |  |  | $ 175,000,000 |  | 175,000,000 |  |  |  |  |
Debt instrument, extension term |  |  | 1 year |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  | 3.12% |  |  |  |  |  |  |
Hedged fixed rate |  |  |  |  |  |  |  | 1.87% | 0.12% |  |  |
2027 Term Loan | SOFR rate | Minimum | Term loans | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  | 1.15% |  |  |  |  |  |  |  |  |
2027 Term Loan | SOFR rate | Minimum | Term loans | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  | 0.80% |  |  |  |  |  |  |  |  |
2027 Term Loan | SOFR rate | Maximum | Term loans | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  | 1.60% |  |  |  |  |  |  |  |  |
2027 Term Loan | SOFR rate | Maximum | Term loans | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  | 1.60% |  |  |  |  |  |  |  |  |
2027 Term Loan | Base Rate | Minimum | Term loans | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  | 0.15% |  |  |  |  |  |  |  |  |
2027 Term Loan | Base Rate | Minimum | Term loans | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  | 0.00% |  |  |  |  |  |  |  |  |
2027 Term Loan | Base Rate | Maximum | Term loans | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  | 0.60% |  |  |  |  |  |  |  |  |
2027 Term Loan | Base Rate | Maximum | Term loans | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  | 0.60% |  |  |  |  |  |  |  |  |
2027 Term Loan | SOFR rate | Term loans | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  |  | 531.00% |  |  |  |  |  |  |
2027 Term Loan | SOFR adjustment | Term loans | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  |  | 0.10% |  |  |  |  |  |  |
Mortgage Note Payable | Mortgages |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, gross |  |  |  |  | $ 8,322,000 |  | 8,361,000 |  |  |  |  |
Interest Rate |  |  |  |  | 4.53% |  |  |  |  |  |  |
Deferred financing costs, gross (less than) |  |  |  |  | $ 100,000 |  |  |  |  |  |  |
Mortgages Outstanding |  |  |  |  | 8,300,000 |  |  |  |  |  |  |
Collateral aggregate net book value |  |  |  |  | 12,500,000 |  |  |  |  |  |  |
Debt discount |  |  |  |  | 600,000 |  |  |  |  |  |  |
2029 Term Loan | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Deferred financing costs, gross (less than) |  | $ 1,400,000 |  |  |  |  |  |  |  |  |  |
Hedged fixed rate |  | 3.74% |  |  |  |  |  |  |  |  |  |
Facility fees |  | $ 900,000 |  |  |  |  |  |  |  |  |  |
2029 Term Loan | Term loans | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, gross |  |  |  |  | $ 250,000,000 |  | $ 150,000,000 |  |  |  |  |
Interest Rate |  |  |  |  | 4.99% |  |  |  |  |  |  |
Increase limit |  | 400,000,000 |  |  |  |  |  |  |  |  |  |
Proceeds under revolving credit facilities | $ 100,000,000.0 | $ 150,000,000 |  |  |  |  |  |  |  |  |  |
Debt term |  | 12 months |  |  |  |  |  |  |  |  |  |
2029 Term Loan | Term loans | Line of Credit | Period One |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Extension term |  | 1 year |  |  |  |  |  |  |  |  |  |
Available extensions | tenant |  | 2 |  |  |  |  |  |  |  |  |  |
2029 Term Loan | Term loans | Line of Credit | Period Two |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Extension term |  | 6 months |  |  |  |  |  |  |  |  |  |
Available extensions | tenant |  | 1 |  |  |  |  |  |  |  |  |  |
2029 Term Loan | SOFR adjustment rate | Term loans | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  |  | 0.10% |  |  |  |  |  |  |
2029 Term Loan | SOFR rate | Term loans | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  |  |  |  | 5.32% |  |  |  |  |  |  |
2029 Term Loan | SOFR rate | Minimum | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  | 1.15% |  |  |  |  |  |  |  |  |  |
2029 Term Loan | SOFR rate | Minimum | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  | 0.80% |  |  |  |  |  |  |  |  |  |
2029 Term Loan | SOFR rate | Maximum | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  | 1.60% |  |  |  |  |  |  |  |  |  |
2029 Term Loan | SOFR rate | Maximum | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  | 1.60% |  |  |  |  |  |  |  |  |  |
2029 Term Loan | Applicable margin | Minimum | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  | 0.15% |  |  |  |  |  |  |  |  |  |
2029 Term Loan | Applicable margin | Maximum | Line of Credit | Prior To Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  | 0.60% |  |  |  |  |  |  |  |  |  |
2029 Term Loan | Secured Overnight Financing Rate (SOFR) Base Rate | Minimum | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  | 0.00% |  |  |  |  |  |  |  |  |  |
2029 Term Loan | Secured Overnight Financing Rate (SOFR) Base Rate | Maximum | Line of Credit | After Investment Grade |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Variable rate (as a percent) |  | 0.60% |  |  |  |  |  |  |  |  |  |

X
- Definition Debt Instrument, Extension Term + References No definition available. + Details
Name: | ntst_DebtInstrumentExtensionTerm
Namespace Prefix: | ntst_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line of Credit Facility, Accordion Feature, Higher Borrowing Capacity Option + References No definition available. + Details
Name: | ntst_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption
Namespace Prefix: | ntst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line of Credit Facility, Accordion Feature, Increase Limit + References No definition available. + Details
Name: | ntst_LineOfCreditFacilityAccordionFeatureIncreaseLimit
Namespace Prefix: | ntst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line of Credit Facility, Sustainability-linked Pricing, Rate Reduction Percentage + References No definition available. + Details
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