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Other Borrowings and Notes Payable | 12 Months Ended
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Dec. 31, 2017
Debt Disclosure [Abstract] |
Other Borrowings and Notes Payable | OTHER BORROWINGS AND NOTES PAYABLE A summary of other borrowings is as follows:
| December 31,
($ in thousands) | 2017 |  | 2016
Securities sold under customer repurchase agreements | $ | 253,674 |  |  | $ | 276,980 |
Average balance during the year | $ | 220,807 |  |  | $ | 206,643 |
Maximum balance outstanding at any month-end | 253,674 |  |  | 276,980 |
Average interest rate during the year | 0.21 | % |  | 0.19 | %
Average interest rate at December 31 | 0.25 | % |  | 0.18 | %
Federal Reserve Line The Bank also has a line with the Federal Reserve Bank of St. Louis which provides additional liquidity to the Company. As of December 31, 2017, $898.1 million was available under this line. This line is secured by a pledge of certain eligible loans aggregating $1.1 billion. There were no amounts drawn on the Federal Reserve line of credit as of December 31, 2017. Revolving Credit In February 2016, the Company entered into a senior unsecured revolving credit agreement ("Revolving Agreement") with another bank allowing for borrowings up to $20 million. The proceeds can be used for general corporate purposes. The Revolving Agreement is subject to ongoing compliance with a number of customary affirmative and negative covenants as well as specified financial covenants. A summary of the amounts drawn on the Revolving Agreement as of December 31, 2017, and 2016 is as follows:
| December 31,
($ in thousands) | 2017 |  | 2016
Outstanding balance | $ | — |  |  | $ | — |
Average balance during the year | $ | 822 |  |  | $ | — |
Maximum balance outstanding at any month-end | 10,000 |  |  | — |
Weighted average interest rate during the year | 3.50 | % |  | — | %
Average interest rate at December 31 | — | % |  | — | %

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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