Borrowed Funds (Borrowed funds obligations) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Debt [Line Items]
Borrowed funds	$ 309,732	$ 289,709
Borrowed funds, Rate	1.50%	1.41%
Securities Sold under Agreements to Repurchase [Member]
Schedule of Debt [Line Items]
Borrowed funds	$ 70,532	$ 95,070
Borrowed funds, Rate	0.12%	0.14%
Federal Funds Purchased [Member]
Schedule of Debt [Line Items]
Borrowed funds	$ 4,200	$ 2,200
Borrowed funds, Rate	0.75%	0.50%
Federal Home Loan Bank Advances [Member]
Schedule of Debt [Line Items]
Borrowed funds	$ 235,000	$ 192,000
Borrowed funds, Rate	1.93%	2.05%
Securities Sold under Agreements to Repurchase [Member]
Schedule of Debt [Line Items]
Borrowed funds	$ 0	$ 439
Borrowed funds, Rate	0.00%	3.25%