Shareholder Report, Line Graph (Details) - USD ($) |
12 Months Ended | 60 Months Ended | 120 Months Ended | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2024 |
Sep. 30, 2024 |
Sep. 30, 2024 |
Sep. 30, 2023 |
Sep. 30, 2022 |
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2014 |
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Northeast Investors Trust | |||||||||||||
Account Value [Line Items] | |||||||||||||
Line Graph and Table Measure Name | NTHEX | ||||||||||||
Account Value | $ 10,211 | $ 10,211 | $ 10,211 | $ 9,290 | $ 8,469 | $ 8,894 | $ 8,323 | $ 8,733 | $ 9,123 | $ 9,158 | $ 8,193 | $ 8,088 | $ 10,000 |
Average Annual Return, Percent | 9.91% | 3.17% | 0.21% | ||||||||||
Northeast Investors Trust Northeast Investors Trust U S High Yield Index [Member] | |||||||||||||
Account Value [Line Items] | |||||||||||||
Line Graph and Table Measure Name | US High Yield Index | ||||||||||||
Account Value | $ 16,219 | $ 16,219 | $ 16,219 | $ 14,021 | $ 12,723 | $ 14,805 | $ 13,282 | $ 12,984 | $ 12,214 | $ 11,866 | $ 10,880 | $ 9,644 | $ 10,000 |
Average Annual Return, Percent | 15.68% | 4.54% | 4.95% |