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Repurchase Agreements | 12 Months Ended
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Dec. 31, 2018
Repurchase Agreements [Abstract] |
Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block] | NOTE K REPURCHASE AGREEMENTS BancShares utilizes securities sold under agreements to repurchase to facilitate the needs of customers and secure wholesale funding needs. Repurchase agreements are transactions whereby BancShares offers to sell to a counterparty an undivided interest in an eligible security at an agreed upon purchase price, and which obligates BancShares to repurchase the security on an agreed upon date at an agreed upon repurchase price plus interest at an agreed upon rate. Securities sold under agreements to repurchase are recorded at the amount of cash received in connection with the transaction and are generally reflected as short-term borrowings on the Consolidated Balance Sheets. BancShares monitors collateral levels on a continuous basis and maintains records of each transaction specifically describing the applicable security and the counterparty’s fractional interest in that security, and segregates the security from general assets in accordance with regulations governing custodial holdings of securities. The primary risk with repurchase agreements is market risk associated with the investments securing the transactions, as additional collateral may be required based on fair value changes of the underlying investments. Securities pledged as collateral under repurchase agreements are maintained with safekeeping agents. The carrying value of available for sale investment securities pledged as collateral under repurchase agreements was $598.6 million and $684.2 million at December 31, 2018 and December 31, 2017, respectively. The remaining contractual maturity of the securities sold under agreements to repurchase by class of collateral pledged included repurchase agreements totaling $543.9 million at December 31, 2018 and $556.2 million at December 31, 2017 with overnight and continuous remaining contractual maturities collateralized by U.S. Treasury securities. At December 31, 2017, there also were repurchase agreements with a remaining contractual maturity of 30-90 days totaling $30.0 million for a gross amount of $586.2 million that were collateralized by U.S. Treasury securities.

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- Definition Repurchase Agreements [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for repurchase agreements (also known as repos), resale agreements (also known as reverse repurchase agreements or reverse repos), securities borrowed transactions, and securities loaned transactions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -URI http://asc.fasb.org/topic&trid=2197590 + Details
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