Recent Accounting Pronouncements and Significant Accounting Policies, Vessel Cost for Second-hand Vessels and Newbuildings (Details) - Vessel	Dec. 31, 2025	Dec. 31, 2024
Vessel Cost for Second-hand Vessels and Newbuildings [Abstract]
Number of vessels in shipyard	0	0

Number of vessels in the shipyard undergoing their scheduled special survey and the installation of their ballast water treatment system.

No definition available.

Name:	pshg_NumberOfVesselsInShipyard
Namespace Prefix:	pshg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant