Short Term Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Short-term Debt [Line Items]
Other Short-term Borrowings	$ 175,657	$ 164,966
Federal Home Loan Bank, Advances, Maturities Summary, Due in Next Twelve Months	55,000	57,000
Short-term Debt, Total	230,657	221,966
Pledged Financial Instruments, Not Separately Reported, Securities for Federal Home Loan Bank	18,000	22,000
Securities Sold under Agreements to Repurchase [Member]
Short-term Debt [Line Items]
Short-term Debt, Total	175,657	164,966
Short-term Debt, Maximum Month-end Outstanding Amount	207,079	199,729
Short-term Debt, Average Outstanding Amount	$ 168,449	$ 172,774
Short-term Debt, Weighted Average Interest Rate, at Point in Time	0.73%	0.49%
Short-term Debt, Weighted Average Interest Rate, over Time	0.66%	0.42%
Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Short-term Debt, Total	$ 55,000	$ 57,000
Short-term Debt, Maximum Month-end Outstanding Amount	205,000	256,000
Short-term Debt, Average Outstanding Amount	$ 47,371	$ 44,553
Short-term Debt, Weighted Average Interest Rate, at Point in Time	1.73%	2.45%
Short-term Debt, Weighted Average Interest Rate, over Time	2.89%	1.95%
Pledged Financial Instruments, Not Separately Reported, Loans Receivable, for Federal Home Loan Bank Debt	$ 1,566,000	$ 1,646,000