Leases - Operating leases that have not yet commenced (Details)	Mar. 31, 2026 item
Leases
Number of additional operating leases not yet commenced	0

Number of additional operating leases not yet commenced.

No definition available.

Name:	hth_NumberOfAdditionalOperatingLeasesNotYetCommenced
Namespace Prefix:	hth_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant