Securities Sold Under Repurchase Agreements (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Securities sold under repurchase agreements by collateral pledged
Total securities sold under repurchase agreements	$ 142,485	$ 125,120
U.S. Government Agency Obligations Issued by U.S. Government Sponsored Agencies [Member]
Securities sold under repurchase agreements by collateral pledged
Total securities sold under repurchase agreements	14,979	22,516
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	$ 127,506	$ 102,604