XML 58 R43.htm IDEA: XBRL DOCUMENT v3.7.0.1

Investment Securities (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Investments [Line Items]
Gross investment gains	$ 27,000	$ 63,000
Gross investment losses	6,000
Investment Securities:
Proceeds from sales of investment securities — available for sale	5,653,000	$ 4,248,000
Book value of securities available for sale and held to maturity	$ 111,529,000		$ 104,953,000
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	111
Standard & Poor's, AAA Rating [Member]
Investments [Line Items]
Portfolio rated	61.30%		79.10%
Standard & Poor's, A Rating [Member]
Investments [Line Items]
Portfolio rated	10.70%		5.70%
Maximum [Member]
Investment Securities:
Consolidated investment securities portfolio modified, years	60 months
Maximum [Member] | Standard & Poor's, A Rating [Member]
Investment Securities:
Consolidated investment securities portfolio modified, years	45 months 6 days
Minimum [Member]
Investment Securities:
Consolidated investment securities portfolio modified, years	24 months
Minimum [Member] | Standard & Poor's, A Rating [Member]
Investment Securities:
Consolidated investment securities portfolio modified, years	41 months 6 days

X

- Definition

Carrying value of available for sale held to maturity and federal home loan bank.

+ References

No definition available.

+ Details

Name:	asrv_CarryingValueOfAvailableForSaleHeldToMaturityAndFederalHomeLoanBankBorrowings
Namespace Prefix:	asrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Consolidated investment securities portfolio modified, years.

+ References

No definition available.

+ Details

Name:	asrv_ConsolidatedInvestmentSecuritiesPortfolioModifiedYears
Namespace Prefix:	asrv_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The gain realized from the sale, exchange, redemption, or retirement of securities, not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.

+ References

No definition available.

+ Details

Name:	asrv_GainOnSaleOfSecurities
Namespace Prefix:	asrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Investment securities.

+ References

No definition available.

+ Details

Name:	asrv_InvestmentSecuritiesAdditionalTextualAbstract
Namespace Prefix:	asrv_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	asrv_InvestmentsLineItems
Namespace Prefix:	asrv_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The loss realized from the sale, exchange, redemption, or retirement of securities, not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.

+ References

No definition available.

+ Details

Name:	asrv_LossOnSaleOfSecurities
Namespace Prefix:	asrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Percentage of investment securities portfolio rated.

+ References

No definition available.

+ Details

Name:	asrv_PercentageOfInvestmentSecuritiesPortfolioRated
Namespace Prefix:	asrv_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Disclosure regarding factors used to determine that the impairment of securities categorized as held-to-maturity where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the held-to-maturity investments determined to be temporarily impaired.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563

+ Details

Name:	us-gaap_HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26853-111562

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (a),(b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_CreditRatingStandardPoorsAxis=us-gaap_StandardPoorsAAARatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditRatingStandardPoorsAxis=us-gaap_StandardPoorsARatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: