Securities Sold Under Repurchase Agreements (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Securities sold under repurchase agreements by collateral pledged
Total securities sold under repurchase agreements	$ 82,500	$ 118,694
Other Residential Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Securities sold under repurchase agreements by collateral pledged
Total securities sold under repurchase agreements	33,250	68,246
Commercial Mortgage-Backed Securities Issued or Guaranteed by FNMA, FHLMC or GNMA [Member]
Securities sold under repurchase agreements by collateral pledged
Total securities sold under repurchase agreements	$ 49,250	$ 50,448

Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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