Shareholder Report |
6 Months Ended | ||||||||||||||||||||||
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Mar. 31, 2026
USD ($)
shares
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| Shareholder Report [Line Items] | |||||||||||||||||||||||
| Document Type | N-CSRS | ||||||||||||||||||||||
| Amendment Flag | false | ||||||||||||||||||||||
| Registrant Name | Northeast Investors Trust | ||||||||||||||||||||||
| Entity Central Index Key | 0000072760 | ||||||||||||||||||||||
| Entity Investment Company Type | N-1A | ||||||||||||||||||||||
| Document Period End Date | Mar. 31, 2026 | ||||||||||||||||||||||
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report | ||||||||||||||||||||||
| Northeast Investors Trust | |||||||||||||||||||||||
| Shareholder Report [Line Items] | |||||||||||||||||||||||
| Fund Name | Northeast Investors Trust | ||||||||||||||||||||||
| Class Name | Northeast Investors Trust | ||||||||||||||||||||||
| Trading Symbol | NTHEX | ||||||||||||||||||||||
| Annual or Semi-Annual Statement [Text Block] | This contains important information about Northeast Investors Trust (the "Fund") for the period of October 1, 2025 to | ||||||||||||||||||||||
| Additional Information [Text Block] | You can find additional information about the Fund at www.northeastinvestors.com/downloads. You can also request this information by contacting us at 1-800-225-6704. | ||||||||||||||||||||||
| Additional Information Phone Number | 1-800-225-6704 | ||||||||||||||||||||||
| Additional Information Website | www.northeastinvestors.com/downloads | ||||||||||||||||||||||
| Expenses [Text Block] |
What were the Fund costs for the last six months?
(based on a hypothetical $10,000 investment)
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| Expenses Paid, Amount | $ 207 | ||||||||||||||||||||||
| Expense Ratio, Percent | 2.06% | ||||||||||||||||||||||
| Net Assets | $ 124,563,692 | ||||||||||||||||||||||
| Holdings Count | shares | 38 | ||||||||||||||||||||||
| Advisory Fees Paid, Amount | $ 316,403 | ||||||||||||||||||||||
| Investment Company, Portfolio Turnover | 13.16% | ||||||||||||||||||||||
| Additional Fund Statistics [Text Block] |
Fund Statistics
(as of March 31, 2026)
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| Holdings [Text Block] |
What did the Fund invest in? (as of March 31, 2026)
Asset Allocation (% of Net Assets)
![]() Top Ten Holdings* (% of Net Assets)
* Does Not Include Cash Equivalents Top Ten Industry Breakdown* (% of Net Assets)
![]() * Does Not Include Cash Equivalents |
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| Largest Holdings [Text Block] |
Top Ten Holdings* (% of Net Assets)
* Does Not Include Cash Equivalents |