Shareholder Report, Line Graph (Details) - USD ($) |
3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | 15 Months Ended | 18 Months Ended | 21 Months Ended | 24 Months Ended | 27 Months Ended | 30 Months Ended | 33 Months Ended | 36 Months Ended | 39 Months Ended | 42 Months Ended | 45 Months Ended | 48 Months Ended | 51 Months Ended | 54 Months Ended | 57 Months Ended | 60 Months Ended | 63 Months Ended | 66 Months Ended | 69 Months Ended | 72 Months Ended | 75 Months Ended | 78 Months Ended | 81 Months Ended | 84 Months Ended | 87 Months Ended | 90 Months Ended | 93 Months Ended | 96 Months Ended | 99 Months Ended | 102 Months Ended | 105 Months Ended | 108 Months Ended | 111 Months Ended | 114 Months Ended | 117 Months Ended | 120 Months Ended | ||
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Jun. 30, 2016 |
Sep. 30, 2016 |
Jun. 30, 2026 |
Dec. 31, 2016 |
Mar. 31, 2017 |
Jun. 30, 2017 |
Sep. 30, 2017 |
Dec. 31, 2017 |
Mar. 31, 2018 |
Jun. 30, 2018 |
Sep. 30, 2018 |
Dec. 31, 2018 |
Mar. 31, 2019 |
Jun. 30, 2019 |
Sep. 30, 2019 |
Dec. 31, 2019 |
Mar. 31, 2020 |
Jun. 30, 2020 |
Sep. 30, 2020 |
Dec. 31, 2020 |
Mar. 31, 2021 |
Jun. 30, 2021 |
Sep. 30, 2021 |
Dec. 31, 2021 |
Mar. 31, 2022 |
Jun. 30, 2022 |
Sep. 30, 2022 |
Dec. 31, 2022 |
Mar. 31, 2023 |
Jun. 30, 2023 |
Sep. 30, 2023 |
Dec. 31, 2023 |
Mar. 31, 2024 |
Jun. 30, 2024 |
Sep. 30, 2024 |
Dec. 31, 2024 |
Mar. 31, 2025 |
Jun. 30, 2025 |
Sep. 30, 2025 |
Dec. 31, 2025 |
Mar. 31, 2026 |
Jun. 30, 2026 |
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| C000012470 | ||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | Polaris Global Value Fund | |||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | $ 10,000 | $ 10,917 | $ 11,465 | $ 12,010 | $ 12,635 | $ 13,107 | $ 13,827 | $ 13,482 | $ 13,662 | $ 13,897 | $ 12,077 | $ 13,330 | $ 13,753 | $ 13,593 | $ 14,830 | $ 10,122 | $ 12,010 | $ 12,535 | $ 15,816 | $ 17,538 | $ 18,011 | $ 17,821 | $ 18,251 | $ 17,408 | $ 15,156 | $ 13,753 | $ 16,058 | $ 16,509 | $ 16,790 | $ 16,415 | $ 18,430 | $ 19,519 | $ 19,329 | $ 20,621 | $ 19,413 | $ 20,192 | $ 21,964 | $ 23,063 | $ 24,648 | $ 26,063 | $ 29,607 | |
| MSCI World Index | ||||||||||||||||||||||||||||||||||||||||||
| Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||
| Line Graph and Table Measure Name | MSCI World Index | |||||||||||||||||||||||||||||||||||||||||
| Accumulated Value | $ 10,000 | $ 10,487 | $ 10,681 | $ 11,362 | $ 11,820 | $ 12,391 | $ 13,074 | $ 12,906 | $ 13,130 | $ 13,784 | $ 11,935 | $ 13,424 | $ 13,961 | $ 14,036 | $ 15,237 | $ 12,029 | $ 14,358 | $ 15,497 | $ 17,660 | $ 18,529 | $ 19,964 | $ 19,963 | $ 21,513 | $ 20,405 | $ 17,102 | $ 16,044 | $ 17,610 | $ 18,972 | $ 20,267 | $ 19,566 | $ 21,799 | $ 23,735 | $ 24,360 | $ 25,910 | $ 25,869 | $ 25,406 | $ 28,320 | $ 30,379 | $ 31,326 | $ 30,207 | $ 34,363 | |