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Short-Term Borrowings (Tables) | 12 Months Ended
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Dec. 31, 2017
Debt Disclosure [Abstract] |
Summary of Federal Funds Purchased and Other Short-term Borrowings | Short-term borrowings, which consist of federal funds purchased and other short-term borrowings are summarized as follows:
|  | At December 31, 2017 |  |  | At December 31, 2016 |
|  | Federal Funds Purchased |  |  | Short-term Borrowings |  |  | Federal Funds Purchased |  |  | Short-term Borrowings |
Outstanding balance at year end |  | $ | — |  |  | $ | 56,900 |  |  | $ | — |  |  | $ | 31,000 |
Maximum indebtedness during the year |  |  | 20,000 |  |  |  | 115,050 |  |  |  | 20,000 |  |  |  | 70,400 |
Average balance during the year |  |  | 119 |  |  |  | 38,825 |  |  |  | 116 |  |  |  | 10,483 |
Average rate paid during the year |  |  | 1.68 | % |  |  | 1.12 | % |  |  | 0.86 | % |  |  | 0.42 | %
Interest rate on year end balance |  |  | — |  |  |  | 1.42 | % |  |  | — |  |  |  | 0.64 | %
|  | At December 31, 2015 |
|  | Federal Funds Purchased |  |  | Short-term Borrowings |
Outstanding balance at year end |  | $ | — |  |  | $ | 53,700 |
Maximum indebtedness during the year |  |  | — |  |  |  | 64,700 |
Average balance during the year |  |  | 69 |  |  |  | 26,880 |
Average rate paid during the year |  |  | 0.53 | % |  |  | 0.20 | %
Interest rate on year end balance |  |  | — |  |  |  | 0.35 | %

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- Definition Tabular disclosure of short-term debt arrangements (having initial terms of repayment within one year or the normal operating cycle, if longer) including: (1) description of the short-term debt arrangement; (2) identification of the lender or type of lender; (3) repayment terms; (4) weighted average interest rate; (5) carrying amount of funds borrowed under the specified short-term debt arrangement as of the balance sheet date; (6) description of the refinancing of a short-term obligation when that obligation is excluded from current liabilities in the balance sheet; and (7) amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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