Investment Securities Pledged Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
federal home loan bank and federal reserve bank [Member] | Available-for-sale securities
Investment [Line Items]
Pledged Financial Instruments, Not Separately Reported, Other Debt Securities Available-for-sale or Held-for-investment	$ 44,618	$ 60,058
federal home loan bank and federal reserve bank [Member] | Held-to-maturity securities
Investment [Line Items]
Pledged Financial Instruments, Not Separately Reported, Other Debt Securities Available-for-sale or Held-for-investment	14,155	16,731
deposits and repurchase agreements [Member] | Available-for-sale securities
Investment [Line Items]
Pledged Financial Instruments, Not Separately Reported, Other Debt Securities Available-for-sale or Held-for-investment	527,655	429,987
deposits and repurchase agreements [Member] | Held-to-maturity securities
Investment [Line Items]
Pledged Financial Instruments, Not Separately Reported, Other Debt Securities Available-for-sale or Held-for-investment	$ 12,975	$ 16,928