Loans (Related Party Loans) (Details) - Related Party Loans [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Executive Officers And Directors [Member]
Related Party Transaction [Line Items]
Balance, beginning of period	$ 24,852	$ 26,476	$ 26,464
Loans and additions	1,845	46	3,699
Change in Directors' status	(10,452)	575	0
Repayments	(7,575)	(2,245)	(3,687)
Balance, end of period	8,670	24,852	26,476
Charitable And Community Organizations to Which Bank Executive Offices and Directors Volunteer [Member]
Related Party Transaction [Line Items]
Balance, beginning of period	9,200	10,400
Balance, end of period	$ 5,400	$ 9,200	$ 10,400