XML 41 R28.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Investment Securities (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2018
Investments [Abstract] |
Schedule of Available for Sale and Held for Maturity Securities Reconciliation [Table Text Block] | Investment securities available for sale (AFS):
|  |  | September 30, 2018
|  |  | Cost Basis |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value
US Agency |  |  | $ | 6,731 |  |  |  | $ | — |  |  |  | $ | (308 | ) |  |  | $ | 6,423 |
US Agency mortgage- backed securities |  |  |  | 87,075 |  |  |  |  | 232 |  |  |  |  | (2,308 | ) |  |  |  | 84,999 |
Municipal |  |  |  | 11,240 |  |  |  |  | 15 |  |  |  |  | (489 | ) |  |  |  | 10,766 |
Corporate bonds |  |  |  | 37,380 |  |  |  |  | 92 |  |  |  |  | (907 | ) |  |  |  | 36,565 |
Total |  |  | $ | 142,426 |  |  |  | $ | 339 |  |  |  | $ | (4,012 | ) |  |  | $ | 138,753 |
Investment securities held to maturity (HTM):
|  |  | September 30, 2018
|  |  | Cost Basis |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value
US Agency mortgage- backed securities |  |  | $ | 8,294 |  |  |  | $ | 65 |  |  |  | $ | (256 | ) |  |  | $ | 8,103 |
Municipal |  |  |  | 24,341 |  |  |  |  | 25 |  |  |  |  | (956 | ) |  |  |  | 23,410 |
Corporate bonds and other securities |  |  |  | 6,038 |  |  |  |  | 10 |  |  |  |  | (216 | ) |  |  |  | 5,832 |
Total |  |  | $ | 38,673 |  |  |  | $ | 100 |  |  |  | $ | (1,428 | ) |  |  | $ | 37,345 |
Investment securities available for sale (AFS):
|  |  | December 31, 2017
|  |  | Cost Basis |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value
US Agency |  |  | $ | 6,612 |  |  |  | $ | — |  |  |  | $ | (40 | ) |  |  | $ | 6,572 |
US Agency mortgage- backed securities |  |  |  | 79,854 |  |  |  |  | 611 |  |  |  |  | (719 | ) |  |  |  | 79,746 |
Municipal |  |  |  | 7,198 |  |  |  |  | 27 |  |  |  |  | (189 | ) |  |  |  | 7,036 |
Corporate bonds |  |  |  | 35,886 |  |  |  |  | 322 |  |  |  |  | (424 | ) |  |  |  | 35,784 |
Total |  |  | $ | 129,550 |  |  |  | $ | 960 |  |  |  | $ | (1,372 | ) |  |  | $ | 129,138 |
Investment securities held to maturity (HTM):
|  |  | December 31, 2017
|  |  | Cost Basis |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value
US Agency mortgage- backed securities |  |  | $ | 9,740 |  |  |  | $ | 149 |  |  |  | $ | (45 | ) |  |  | $ | 9,844 |
Municipal |  |  |  | 22,970 |  |  |  |  | 203 |  |  |  |  | (238 | ) |  |  |  | 22,935 |
Corporate bonds and other securities |  |  |  | 6,042 |  |  |  |  | 38 |  |  |  |  | (48 | ) |  |  |  | 6,032 |
Total |  |  | $ | 38,752 |  |  |  | $ | 390 |  |  |  | $ | (331 | ) |  |  | $ | 38,811 |
Schedule of Unrealized Loss on Investments [Table Text Block] | The following tables present information concerning investments with unrealized losses as of September 30, 2018 and December 31, 2017 (in thousands): Total investment securities:
|  |  | September 30, 2018
|  |  | Less than 12 months |  |  | 12 months or longer |  |  | Total
|  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses
US Agency |  |  | $ | 2,734 |  |  |  | $ | (109 | ) |  |  | $ | 3,689 |  |  |  | $ | (199 | ) |  |  | $ | 6,423 |  |  |  | $ | (308 | )
US Agency mortgage-backed securities |  |  |  | 49,544 |  |  |  |  | (1,211 | ) |  |  |  | 29,471 |  |  |  |  | (1,353 | ) |  |  |  | 79,015 |  |  |  |  | (2,564 | )
Municipal |  |  |  | 19,978 |  |  |  |  | (619 | ) |  |  |  | 11,847 |  |  |  |  | (826 | ) |  |  |  | 31,825 |  |  |  |  | (1,445 | )
Corporate bonds and other securities |  |  |  | 21,320 |  |  |  |  | (547 | ) |  |  |  | 12,979 |  |  |  |  | (576 | ) |  |  |  | 34,299 |  |  |  |  | (1,123 | )
Total |  |  | $ | 93,576 |  |  |  | $ | (2,486 | ) |  |  | $ | 57,986 |  |  |  | $ | (2,954 | ) |  |  | $ | 151,562 |  |  |  | $ | (5,440 | )
Total investment securities:
|  |  | December 31, 2017
|  |  | Less than 12 months |  |  | 12 months or longer |  |  | Total
|  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses
US Agency |  |  | $ | 5,923 |  |  |  | $ | (39 | ) |  |  | $ | 399 |  |  |  | $ | (1 | ) |  |  | $ | 6,322 |  |  |  | $ | (40 | )
US Agency mortgage-backed securities |  |  |  | 36,783 |  |  |  |  | (253 | ) |  |  |  | 22,625 |  |  |  |  | (511 | ) |  |  |  | 59,408 |  |  |  |  | (764 | )
Municipal |  |  |  | 8,657 |  |  |  |  | (109 | ) |  |  |  | 7,727 |  |  |  |  | (318 | ) |  |  |  | 16,384 |  |  |  |  | (427 | )
Corporate bonds and other securities |  |  |  | 7,123 |  |  |  |  | (71 | ) |  |  |  | 13,655 |  |  |  |  | (401 | ) |  |  |  | 20,778 |  |  |  |  | (472 | )
Total |  |  | $ | 58,486 |  |  |  | $ | (472 | ) |  |  | $ | 44,406 |  |  |  | $ | (1,231 | ) |  |  | $ | 102,892 |  |  |  | $ | (1,703 | )
Schedule of Contractual Maturities of Securities [Table Text Block] | Total investment securities:
|  |  | September 30, 2018
|  |  | Available for sale |  |  | Held to maturity
|  |  | Cost Basis |  |  | Fair Value |  |  | Cost Basis |  |  | Fair Value
Within 1 year |  |  | $ | 48 |  |  |  | $ | 49 |  |  |  | $ | 1,000 |  |  |  | $ | 973 |
After 1 year but within 5 years |  |  |  | 20,140 |  |  |  |  | 19,890 |  |  |  |  | 3,658 |  |  |  |  | 3,471 |
After 5 years but within 10 years |  |  |  | 47,068 |  |  |  |  | 45,673 |  |  |  |  | 18,017 |  |  |  |  | 17,362 |
After 10 years but within15 years |  |  |  | 29,952 |  |  |  |  | 29,194 |  |  |  |  | 11,605 |  |  |  |  | 11,292 |
Over 15 years |  |  |  | 45,218 |  |  |  |  | 43,947 |  |  |  |  | 4,393 |  |  |  |  | 4,247 |
Total |  |  | $ | 142,426 |  |  |  | $ | 138,753 |  |  |  | $ | 38,673 |  |  |  | $ | 37,345 |

X
- Definition Tabular disclosure of the reconciliation of available-for-sale and held for maturity securities from cost basis to fair value. + References No definition available. + Details
Name: | asrv_ScheduleOfAvailableForSaleAndHeldForMaturitySecuritiesReconciliationTableTextBlock
Namespace Prefix: | asrv_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
Name: | us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration