v3.26.1
Shareholder Report
6 Months Ended
Mar. 31, 2026
USD ($)
shares
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 semi-annual shareholder report contains important information about Northeast Investors Trust (the "Fund") for the period of October 1, 2025 to March 31, 2026.
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)
Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment
Northeast Investors Trust $207 2.06%
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)
Net Assets ($) $124,563,692
Number of Portfolio Holdings 38
Portfolio Turnover Rate (%) 13.16%
Total Trustee Fees Paid ($) $316,403
Holdings [Text Block]
What did the Fund invest in? (as of March 31, 2026)
Asset Allocation (% of Net Assets)
Af Image
Top Ten Holdings* (% of Net Assets)
Homer City Holdings, LLC 7.9%
Pyxus Holdings, Inc., 8.125%, 12/31/27 7.7%
Tidewater, Inc., 9.125%, 7/15/30 4.3%
KB Home 7.25%, 7/15/30 4.1%
XPO, Inc. 6.25%, 6/1/28 4.1%
Anywhere Real Estate Group LLP, 7%, 4/15/30 4.0%
SS&C Technologies 5.5%, 9/30/27 4.0%
Moog, Inc., 4.25%, 12/15/27 4.0%
Pitney Bowes, Inc., 6.875%, 3/15/27 4.0%
Under Armour, Inc., 3.25%, 6/15/26 4.0%

* Does Not Include Cash Equivalents

Top Ten Industry Breakdown* (% of Net Assets)
Af Image

* Does Not Include Cash Equivalents

Largest Holdings [Text Block]
Top Ten Holdings* (% of Net Assets)
Homer City Holdings, LLC 7.9%
Pyxus Holdings, Inc., 8.125%, 12/31/27 7.7%
Tidewater, Inc., 9.125%, 7/15/30 4.3%
KB Home 7.25%, 7/15/30 4.1%
XPO, Inc. 6.25%, 6/1/28 4.1%
Anywhere Real Estate Group LLP, 7%, 4/15/30 4.0%
SS&C Technologies 5.5%, 9/30/27 4.0%
Moog, Inc., 4.25%, 12/15/27 4.0%
Pitney Bowes, Inc., 6.875%, 3/15/27 4.0%
Under Armour, Inc., 3.25%, 6/15/26 4.0%

* Does Not Include Cash Equivalents