Borrowings Schedule of Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Borrowings [Line Items]
Short-term Debt	$ 0
Long-term Debt	10,313	$ 14,063
Advances from Federal Home Loan Banks	60,038	40,094
Junior subordinated debentures	24,000	23,917
Short Term and Long Term Borrowings	249,739	267,837
Securities Sold under Agreements to Repurchase [Member]
Schedule of Borrowings [Line Items]
Short-term Debt	155,388	185,763
Notes Payable, Other Payables [Member]
Schedule of Borrowings [Line Items]
Short-term Debt	$ 0	$ 4,000