CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
OPERATING ACTIVITIES
Net income (loss)	$ 3,601,000	$ (3,346,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Provision for credit losses	884,000	7,429,000
Depreciation and amortization expense	2,059,000	2,047,000
Amortization expense of core deposit intangible	24,000	27,000
Amortization of fair value adjustment on acquired time deposits	(8,000)	(33,000)
Net amortization of investment securities	76,000	49,000
Net realized losses on investment securities - available for sale		922,000
Net amortization of deferred loan fees	(132,000)	(104,000)
Net gains on loans held for sale	(174,000)	(169,000)
Origination of mortgage loans held for sale	(11,426,000)	(9,210,000)
Sales of mortgage loans held for sale	11,270,000	9,308,000
Decrease (increase) in accrued interest receivable	43,000	(725,000)
(Decrease) increase in accrued interest payable	(335,000)	3,069,000
Earnings on bank-owned life insurance	(1,067,000)	(1,047,000)
Deferred income taxes	(34,000)	(565,000)
Stock compensation expense	8,000	45,000
Net change in operating leases	(169,000)	(70,000)
Other, net	(1,933,000)	(1,339,000)
Net cash provided by operating activities	2,687,000	6,288,000
INVESTING ACTIVITIES
Purchase of investment securities - available for sale	(16,353,000)	(21,255,000)
Purchase of investment securities - held to maturity	(6,449,000)	(7,970,000)
Proceeds from maturities of investment securities - available for sale	26,062,000	17,973,000
Proceeds from maturities of investment securities - held to maturity	6,490,000	5,770,000
Proceeds from sales of investment securities - available for sale	935,000	16,772,000
Purchase of regulatory stock	(15,214,000)	(19,672,000)
Proceeds from redemption of regulatory stock	15,665,000	20,216,000
Long-term loans originated	(183,029,000)	(200,770,000)
Principal collected on long-term loans	149,530,000	149,897,000
Purchases of premises and equipment	(1,711,000)	(1,381,000)
Proceeds from sale of other real estate owned and repossessed assets	264,000	39,000
Proceeds from life insurance policies	711,000	387,000
Net cash used in investing activities	(23,099,000)	(39,994,000)
FINANCING ACTIVITIES
Net increase in deposit balances	42,643,000	49,856,000
Net decrease in other short-term borrowings	(26,309,000)	(47,690,000)
Principal borrowings on advances from Federal Home Loan Bank	28,703,000	42,365,000
Principal repayments on advances from Federal Home Loan Bank	(17,207,000)	(17,568,000)
Principal payments on financing lease liabilities	(168,000)	(228,000)
Stock options exercised		94,000
Purchases of treasury stock	(1,511,000)
Common stock dividend paid	(2,020,000)	(2,058,000)
Net cash provided by financing activities	24,131,000	24,771,000
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	3,719,000	(8,935,000)
CASH AND CASH EQUIVALENTS AT JANUARY 1	14,027,000	22,962,000
CASH AND CASH EQUIVALENTS AT DECEMBER 31	$ 17,746,000	$ 14,027,000

Amortization of fair value adjustment on acquired time deposits.

No definition available.

Name:	asrv_AmortizationOfFairValueAdjustmentOnAcquiredTimeDeposits
Namespace Prefix:	asrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.