Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Standby letters of credit, required to perform on financial guarantees	$ 0	$ 0
Standby letters of credit that expire within one year	105,500
Standby letters of credit that expire thereafter	10,300
Standby letters of credit fees	1,600	$ 1,500
Residential mortgage loan repurchase reserve liability	1,000
Days past due of GNMA loans available for repurchase		90 days
GNMA Loans past due by 90 days, but not yet repurchased	$ 0
Real Estate Loans as Part of Loan portfolio [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	71.00%	76.00%