Note 5 - Foreclosed Properties (Details) - Foreclosed Properties Valuation Allowance (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Foreclosed Properties Valuation Allowance [Abstract]
Other real estate owned, beginning balance	$ 7,408	$ 9,078
Other real estate owned, valuation allowance, beginning balance	(422)	(935)
Other real estate owned, net, beginning balance	6,986	8,143
Other real estate owned, ending balance	7,339	7,688
Other real estate owned, valuation allowance, ending balance	(422)	(513)
Other real estate owned, net, ending balance	6,917	7,175
Other real estate owned, sales	(69)hmta_OtherRealEstateOwnedDisposalsGross	(1,390)hmta_OtherRealEstateOwnedDisposalsGross
Other real estate owned, valuation allowance, sales		422
Other real estate owned, sales, net	$ (69)	$ (968)

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Disposals of real estate acquired through foreclosure before the application of a valuation allowance.

+ References

No definition available.

+ Details

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- Definition

Amount of real estate acquired through foreclosure before the application of a valuation allowance.

+ References

No definition available.

+ Details

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- Definition

Sales of real estate acquired through foreclosure net of the valuation allowance.

+ References

No definition available.

+ Details

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- Definition

Impact on the valuation allowance of other real estate owned due to sales during the period.

+ References

No definition available.

+ Details

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- Definition

Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4437-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 28

-Article 12

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph c

-Subparagraph Schedule III

-Article 5

+ Details

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- Definition

For each period for which an income statement is required, disclosure of the changes in the allowance, including balances at end of period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10(4))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 10

-Subparagraph 4

-Article 9

+ Details

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