Borrowings, Sales and Leaseback (Details) - SLB Facility [Member] - Vessel	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Bank Borrowings [Abstract]
Number of exercised purchase option of existing sales and leaseback financings	6	9
IMO II Handy [Member]
Bank Borrowings [Abstract]
Number of vessels refinanced		5

Number of exercised purchase option of existing sales and leaseback financings base facilities from external financial institutions.

No definition available.

Name:	hafn_NumberOfExercisedPurchaseOptionOfExistingSalesAndLeasebackFinancings
Namespace Prefix:	hafn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration