Securities Sold Under Repurchase Agreements (Details) $ in Thousands	Sep. 30, 2015 USD ($)
Securities sold under repurchase agreements by collateral pledged
Total securities sold under repurchase agreement	$ 154,647
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 agreement	34,747
Obligations of States and Political Subdivisions [Member]
Securities sold under repurchase agreements by collateral pledged
Total securities sold under repurchase agreement	11,506
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 agreement	106,807
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 agreement	$ 1,587