Vessels and Equipment - Drydocking activity (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2026	Dec. 31, 2025
Drydocking activity
Balance at the beginning of the year	$ 29,323	$ 28,661
Costs incurred for drydocking	14,435	14,690
Costs allocated to drydocking as part of acquisition of asset		2,340
Drydock amortization as part of sale of asset		(1,526)
Drydock amortization	(7,873)	(14,842)
Balance at period end	$ 35,885	$ 29,323

Amount of amortization during the period of capitalized drydocking costs.

No definition available.

Name:	knop_AmortizationOfDrydocking
Namespace Prefix:	knop_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of amortization on sale of asset during the period of capitalized drydocking costs.

No definition available.

Name:	knop_AmortizationOfDrydockingOnSaleOfAsset
Namespace Prefix:	knop_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Increase in capitalized costs associated with drydocking resulting from business acquisitions during the period.

No definition available.

Name:	knop_CapitalizedCostRelatingToDryDocking
Namespace Prefix:	knop_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Carrying amount of drydocking costs capitalized as part of property, plant and equipment.

No definition available.

Drydocking costs incurred during the period and capitalized as part of property, plant and equipment.

No definition available.

Name:	knop_DrydockingCostIncurred
Namespace Prefix:	knop_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

Name:	knop_MovementInCapitalizedDrydockingCostsRollForward
Namespace Prefix:	knop_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration