Institutional Class Z [Member] Annual Total Returns |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Institutional Z | Harding Loevner International Small Companies Portfolio | Institutional Class Z | ||
| Prospectus [Line Items] | ||
| Annual Return [Percent] | 15.22% | (6.67%) |