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DERIVATIVE HEDGING INSTRUMENTS (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Derivative [Line Items]
Maximum notional amount outstanding permitted	$ 500,000,000
Interest Rate Swap [Member]
Derivative [Line Items]
Increase (decrease) in interest expense
Interest Rate Swap One [Member]
Derivative [Line Items]
Start date	Dec. 12, 2008
Maturity date	Sep. 24, 2013
Notional amount	9,000,000
Variable interest rate	5.25%
Fixed interest rate	2.73%
Increase (decrease) in interest expense	165,488
Interest Rate Swap Two [Member]
Derivative [Line Items]
Start date	Dec. 12, 2008
Maturity date	Sep. 24, 2013
Notional amount	9,000,000
Variable interest rate	2.73%
Fixed interest rate	5.25%
Increase (decrease) in interest expense	$ (165,488)

X

- Definition

Maximum Notional Amount Of Derivatives Outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	asrv_
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X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

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X

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
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X

- Definition

Date the entity entered into the derivative contract, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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Period Type:	duration

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- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

+ References

No definition available.

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Data Type:	xbrli:dateItemType
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Period Type:	duration

X

- Definition

Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of unrealized gain (loss) included in earnings related to the fair value of the hedged item in an interest rate fair value hedge, offset by the gain (loss) on the hedging instrument to the extent that the fair value hedge is determined to be effective.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959

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