Investment Securities - Schedule Of Realized Gross Gains And Losses On Sale From Available For Sale Portfolio (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Marketable Securities [Abstract]
Gross gains on sales of securities	$ 0	$ 52,000	$ 2,514,000
Gross (losses) on sales of securities	(267,000)	0	(1,922,000)
Net gain/(loss) on sales of securities	(267,000)	52,000	592,000
Proceeds from sales	$ 191,700,000	$ 0	937,000,000.0
Gain associated with call of held-to-maturity securities			400,000
Held-to-maturity security called			$ 4,400,000