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Repurchase Reserve Liability (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Assets Sold Under Agreements To Repurchase [Roll Forward]
Balance at beginning of year	$ 160	$ 160	$ 160	$ 160
Provision for repurchase liability	0	2	0	2
Reimbursement of expenses	0	(2)	0	(2)
Balance at end of year	$ 160	$ 160	$ 160	$ 160

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

Name:	hwbk_AssetsSoldUnderAgreementsToRepurchaseRollForward
Namespace Prefix:	hwbk_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents provision for repurchase liability.

+ References

No definition available.

+ Details

Name:	hwbk_ProvisionForRepurchaseLiability
Namespace Prefix:	hwbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents Reimbursement of expenses.

+ References

No definition available.

+ Details

Name:	hwbk_ReimbursementOfExpenses
Namespace Prefix:	hwbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount to be repaid to the counterparty to the repurchase agreement when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under the repurchase agreement exceeds 10 percent of total assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(m)(1)(i)(A)(ii))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_AssetsSoldUnderAgreementsToRepurchaseRepurchaseLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant