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Namespace Prefix:	trst_
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Non accrual residential mortgage loans in the process of foreclosure.

No definition available.

Name:	trst_NonAccrualResidentialMortgageLoansInTheProcessOfForeclosure
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Data Type:	xbrli:monetaryItemType
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- References

No definition available.

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Other real estate mortgage loans that are on nonperforming status on balance sheet date.

No definition available.

Name:	trst_OtherRealEstateMortgageLoans
Namespace Prefix:	trst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Carrying amount of residential real estate assets taken in settlement of troubled loans through surrender on foreclosure.

No definition available.

Name:	trst_OtherRealEstateOwned
Namespace Prefix:	trst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524

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