Summary of Significant Accounting Policies - Narrative (Details)	Jul. 01, 2023
Accounting Policies [Abstract]
Special stock dividend, rate percent (in percent)	4.00%

The percentage rate used to calculate dividend payments on common stock.

No definition available.

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Namespace Prefix:	hwbk_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration