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Securities Sold Under Agreements to Repurchase (Tables) | 12 Months Ended
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Dec. 31, 2018
Brokers And Dealers [Abstract] |
Summary of Securities Pledged as Collateral Under Repurchase Agreements | The following table presents detail regarding the securities pledged as collateral under repurchase agreements as of December 31, 2018 and 2017. All of the repurchase agreements are overnight agreements.
|  | December 31, 2018 |  |  | December 31, 2017 |
Securities pledged for repurchase agreements: |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 861 |  |  | $ | 874 |
Obligations of U.S. government agencies |  |  | 21,338 |  |  |  | 20,881 |
Total securities pledged |  | $ | 22,199 |  |  | $ | 21,755 |
Gross amount of recognized liabilities for repurchase agreements |  | $ | 22,199 |  |  | $ | 21,755 |
Amounts related to agreements not included in offsetting disclosures above |  | $ | — |  |  | $ | — |
Schedule of Securities Sold Under Agreements to Repurchase | Information concerning securities sold under agreements to repurchase was as follows:
|  | 2018 |  |  | 2017 |  |  | 2016 |
Outstanding balance at year end |  | $ | 22,199 |  |  | $ | 21,755 |  |  | $ | 28,925 |
Average balance during the year |  |  | 18,456 |  |  |  | 18,234 |  |  |  | 21,767 |
Average interest rate during the year |  |  | 0.10 | % |  |  | 0.10 | % |  |  | 0.10 | %
Maximum month-end balance during the year |  | $ | 22,199 |  |  | $ | 23,889 |  |  | $ | 28,925 |
Weighted average interest rate at year end |  |  | 0.10 | % |  |  | 0.10 | % |  |  | 0.10 | %

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- Definition Tabular disclosure of derivative and other financial liabilities that are subject to offsetting, including master netting arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225877-175312 + Details
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