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Intangible Assets (Details 2) (Mortgage servicing rights (MSRs))	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Mortgage servicing rights (MSRs)
Assumptions used in estimating the fair value of mortgage service rights
Weighted-Average Constant Prepayment Rate (as a percent)	10.54%us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember	9.48%us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember
Weighted-Average Note Rate (as a percent)	3.99%hwbk_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageNoteRate / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember	4.01%hwbk_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageNoteRate / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember
Weighted-Average Discount Rate (as a percent)	9.21%us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember	9.06%us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_ServicingContractsMember
Weighted-Average Expected Life (in years)	5 years 8 months 12 days	6 years 1 month 6 days

X

- Definition

The weighted average note rate used to estimate the fair value of servicing assets and servicing liabilities.

+ References

No definition available.

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X

- Definition

Discount rate used to estimate the fair value of servicing assets and servicing liabilities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 2

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122596-111746

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X

- Definition

Estimated rate of prepayments of principal on servicing assets and servicing liabilities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 2

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122596-111746

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X

- Definition

Weighted average life of financial assets and financial liabilities, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 2

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122596-111746

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