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Short-Term Borrowings (Tables) | 12 Months Ended
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Dec. 31, 2020
Debt Disclosure [Abstract] |
Short-term borrowings | Short-term borrowings as of December 31 are summarized as follows:
| 2020 |  | 2019
Securities sold under agreements to repurchase | $ | 10,947 |  |  | $ | 9,091 |
Federal funds purchased | 10,393 |  |  | — |
Federal Home Loan Bank short-term advances | — |  |  | 480,000 |
Total short-term borrowings | $ | 21,340 |  |  | $ | 489,091 |
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
| 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
Federal Home Loan Bank short-term advances | $ | 345,601 |  |  | $ | 114,965 |  |  | $ | 147,749 |  |  | 1.09 | % |  | 2.59 | % |  | 2.21 | %
Federal funds purchased | 363 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Securities sold under agreements to repurchase | 10,889 |  |  | 8,479 |  |  | 7,986 |  |  | 0.30 |  |  | 0.15 |  |  | 0.17 |
Total short-term borrowings | $ | 356,853 |  |  | $ | 123,444 |  |  | $ | 155,735 |  |  | 1.07 | % |  | 2.43 | % |  | 2.10 | %

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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://fasb.org/us-gaap/role/ref/legacyRef -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=120391452&loc=d3e13212-122682 + Details
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