Related party transactions - Revolving credit facility (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Related party transactions
Revolving credit facility	$ 8,792	$ 39,292

The amount of revolving credit due to owners and affiliates of the balance sheet date.

No definition available.

Name:	hmlp_RevolvingCreditDueToOwnersAndAffiliates
Namespace Prefix:	hmlp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant