Loans, Allowance for Credit Losses, and Asset Quality Information (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]
PPP loans approved and funded	$ 241,400		$ 240,500
Unamortized net deferred loan costs (fees)	6,543	$ (1,712)	3,698
Unamortized discount on loans acquired	8,200
Payments that exceeded carrying amount of PCI loans		446
Loan discount accretion income		352
Additional loan interest income		80
Interest income on restructured loans			1,100
Allowance for loan losses	$ 65,849	$ 24,498	52,388	$ 21,398
Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Threshold percentage to write-off nonaccrual loans	90.00%
Hotel | Minimum
Loans and Leases Receivable Disclosure [Line Items]
Threshold percentage to write-off nonaccrual loans	10.00%
Hotel | Maximum
Loans and Leases Receivable Disclosure [Line Items]
Threshold percentage to write-off nonaccrual loans	25.00%
Non Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Threshold percentage to write-off nonaccrual loans	75.00%
Real estate – mortgage – residential (1-4 family) first mortgages
Loans and Leases Receivable Disclosure [Line Items]
Presold mortgages in process of settlement	$ 1,900		1,900
Unfunded Loan Commitment
Loans and Leases Receivable Disclosure [Line Items]
Allowance for loan losses	8,086		582
SBA PPP loans
Loans and Leases Receivable Disclosure [Line Items]
Unamortized net deferred loan costs (fees)	9,000		6,000
SBA Loans
Loans and Leases Receivable Disclosure [Line Items]
Remaining unaccreted discount	$ 7,300		7,300
Purchased Non-Impaired Loans
Loans and Leases Receivable Disclosure [Line Items]
Remaining unaccreted discount			$ 7,900