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Fair Value Measurements (Details Textuals) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Gains included in earnings attributable to change in unrealized gains or losses	$ (41,000)hwbk_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsAttributableToChangeInUnrealizedGains	$ 106,000hwbk_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsAttributableToChangeInUnrealizedGains
Impaired loans with a specific allowance	7,731,000us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	14,700,000us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	7,438,000us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
Specific allowance related to impaired loans	2,440,000us-gaap_ImpairedFinancingReceivableRelatedAllowance	4,800,000us-gaap_ImpairedFinancingReceivableRelatedAllowance	1,749,000us-gaap_ImpairedFinancingReceivableRelatedAllowance
Impaired financing receivable charge offs	$ 95,000hwbk_ImpairedFinancingReceivableChargeOffs	$ 1,100,000hwbk_ImpairedFinancingReceivableChargeOffs

X

- Definition

Represents fair value measurement with unobservable inputs reconciliation recurring basis asset gain loss included in earnings attributable to change in unrealized gains.

+ References

No definition available.

+ Details

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Namespace Prefix:	hwbk_
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Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the amount related to charge off of impaired financing receivable during the period.

+ References

No definition available.

+ Details

Name:	hwbk_ImpairedFinancingReceivableChargeOffs
Namespace Prefix:	hwbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Details

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

X

- Definition

Amount of allowance for credit losses related to recorded investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524

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Namespace Prefix:	us-gaap_
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Period Type:	instant

X

- Definition

Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953550-111524

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