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Revenue Recognition (Tables) | 9 Months Ended
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Sep. 30, 2018
Revenue from Contract with Customer [Abstract] |
Non Interest Income [Table Text Block] | The following presents noninterest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the three and nine month periods ending September 30, 2018 and 2017 (in thousands).
|  |  | Three months ended September 30, |  |  | Nine months ended September 30,
|  |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017
Noninterest income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
In-scope of Topic 606 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Wealth management fees |  |  | $ | 2,359 |  |  |  | $ | 2,208 |  |  |  | $ | 7,232 |  |  |  | $ | 6,758 |
Service charges on deposit accounts |  |  |  | 326 |  |  |  |  | 409 |  |  |  |  | 1,066 |  |  |  |  | 1,168 |
Other |  |  |  | 439 |  |  |  |  | 410 |  |  |  |  | 1,291 |  |  |  |  | 1,236 |
Noninterest income (in-scope of topic 606) |  |  |  | 3,124 |  |  |  |  | 3,027 |  |  |  |  | 9,589 |  |  |  |  | 9,162 |
Noninterest income (out-of-scope of topic 606) |  |  |  | 462 |  |  |  |  | 602 |  |  |  |  | 1,313 |  |  |  |  | 1,784 |
Total noninterest income |  |  | $ | 3,586 |  |  |  | $ | 3,629 |  |  |  | $ | 10,902 |  |  |  | $ | 10,946 |

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- Definition The tabular disclosure of information regarding non interest income. + References No definition available. + Details
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Namespace Prefix: | asrv_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration