Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Impairment of long lived assets	$ 30.9	$ 30.9

Tangible Asset Impairment Charges, Excluding Project Write Downs

No definition available.

Name:	ha_TangibleAssetImpairmentChargesExcludingProjectWriteDowns
Namespace Prefix:	ha_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration