Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
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

Includes amounts charged depositors for: (1) maintenance of their accounts (maintenance charges); (2) failure to maintain specified minimum balances on account; (3) exceeding the number of checks or transactions allowed to be processed in a given period; (4) checks drawn on no minimum balance deposit accounts; (5) withdrawals from nontransaction deposit accounts; (6) closing savings accounts before a specified minimum period of time has elapsed; (7) accounts which have remained inactive for extended periods of time or which have become dormant; (8) use of automated teller machines or remote service units; (9) checks drawn against insufficient funds that the bank assesses regardless of whether it decides to pay, return or hold the check; (10) issuing stop payment orders; (11) certifying checks; and (12) accumulating or disbursing funds deposited in IRAs or Keogh Plan accounts when not handled by the bank's trust department. This item does not include penalties assessed on the early with

No definition available.

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