Securities (Proceeds from Sales and Gross Realized Gains / Losses) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales		$ 0	$ 0	$ 0	$ 9,920
Gross realized gains		0	0	0	0
Gross realized losses		0	0	0	(80)
Net realized losses on securities	[1]	$ 0	$ 0	$ 0	$ (80)

[1] As reported in the Consolidated Statements of Income.