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Short-Term Borrowings (Tables) | 12 Months Ended
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Dec. 31, 2017
Debt Disclosure [Abstract] |
Short-term borrowings | Short-term borrowings as of December 31 are summarized as follows:
| 2017 |  | 2016
Securities sold under agreements to repurchase | $ | 6,814 |  |  | $ | 9,676 |
Federal Home Loan Bank short-term advances | 83,000 |  |  | 100,000 |
Total short-term borrowings | $ | 89,814 |  |  | $ | 109,676 |
Average balances and cost of funds of short-term borrowings | The average balances and cost of funds of short-term borrowings for the years ending December 31 are summarized as follows:
| Average Balances |  | Cost of Funds
| 2017 |  | 2016 |  | 2015 |  | 2017 |  | 2016 |  | 2015
Federal Home Loan Bank short-term advances | $ | 208,332 |  |  | $ | 344,724 |  |  | $ | 207,575 |  |  | 1.27 | % |  | 0.46 | % |  | 0.18 | %
Securities sold under agreements to repurchase | 9,215 |  |  | 12,205 |  |  | 15,515 |  |  | 0.17 |  |  | 0.20 |  |  | 0.21 |
Total short-term borrowings | $ | 217,547 |  |  | $ | 356,929 |  |  | $ | 223,090 |  |  | 1.22 | % |  | 0.45 | % |  | 0.18 | %

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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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