Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Wealth management fees	$ 2,447	$ 2,240	$ 4,873	$ 4,550
Service charges on deposit accounts	357	385	740	759
Other	435	431	852	826
Noninterest income (in-scope of topic 606)	3,239	3,056	6,465	6,135
Noninterest income (out-of-scope of topic 606)	442	699	851	1,182
Total noninterest income	$ 3,681	$ 3,755	$ 7,316	$ 7,317

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