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Earnings per Share - Stock Dividend (Details)	Jul. 01, 2021
Earnings per Share
Dividends Payable, Date to be Paid	Jul. 01, 2021
Special stock dividend, rate percent	4.00%
Special stock dividend, record date	Jun. 15, 2021

X

- Definition

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

+ References

No definition available.

+ Details

Name:	hwbk_CommonStockDividendRatePercentage
Namespace Prefix:	hwbk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_DividendsPayableDateOfRecordDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration