Loans (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Apr. 01, 2019	Jul. 01, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Business Combination, Acquired Receivable, Fair Value						$ 578,577,000
Business Combination, Acquired Receivables, Gross Contractual Amount						589,698,000	$ 277,900,000
Loans and Leases Receivable, Deferred Income	$ 32,900,000		$ 32,900,000		$ 16,300,000
Goodwill, Purchase Accounting Adjustments			9,200,000		11,700,000
Troubled Debt Restructuring, Classification removed	884,000	$ 0	884,000	$ 23,000
Partial Charge-Offs On Impaired Loans			650,000		719,000
Impaired Financing Receivable, Related Allowance	5,808,000		5,808,000		5,230,000
Recorded investment, related to loans	16,400,000		16,400,000		12,700,000
Troubled Debt Restructuring Included In Nonaccrual Loans	27,300,000		27,300,000		34,300,000
TDRs included in accruing loan totals	24,100,000		24,100,000		21,300,000
Nonaccrual Trouble Debt Restructuring Current	16,700,000		16,700,000		23,200,000
Commitments to lend additional funds to borrowers whose terms had been modified in a TDR	3,300,000		3,300,000		7,900,000
Specific reserves related to troubled debt restructuring	2,100,000		2,100,000		2,200,000
Additional Specific Reserves Related To Troubled Debt Restructuring	0		0	1,000
Financing Receivable, Modifications, Recorded Investment, During Period	4,215,000	5,244,000	7,120,000	9,182,000
Loan Modifications on Nonacrrual status	43,000	600,000	$ 300,000	1,300,000
Loan past due period before entering default status			30 days
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	4,600,000	1,200,000	$ 4,700,000	1,400,000
Deposit Liabilities Reclassified as Loans Receivable	3,700,000		3,700,000		2,200,000
PPP loans originated [Line Items]	543,100,000
SBA Fees received			20,200,000
SBA PPP Fees recognized			2,800,000
PPP loans receivable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans and Leases Receivable, Deferred Income	16,800,000		16,800,000
Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Partial Charge-Offs On Impaired Loans			500,000		500,000
Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Partial Charge-Offs On Impaired Loans			197,000		210,000
Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	1,643,000	780,000	2,844,000	2,995,000
Commercial Real Estate [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Impaired Financing Receivable, Related Allowance	0		0		0
Commercial Real Estate [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Impaired Financing Receivable, Related Allowance	80,000		80,000		35,000
Accruing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	1,146,000	2,397,000	2,579,000	3,092,000
Loans modified during period	4,200,000	30,000	4,200,000	30,000
Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period			1,141,000
Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	3,069,000	2,847,000	4,541,000	6,090,000
Loans modified during period	400,000	1,200,000	500,000	1,400,000
Nonaccrual [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	1,643,000	780,000	1,703,000	2,995,000
Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	39,400,000	$ 7,400,000	45,300,000	13,400,000
Financing Receivables, COVID Modifications, Recorded Investment, During Period	108,300,000		113,300,000
Consumer [Member] | Covid Restructuring [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivables, COVID Modifications, Recorded Investment, During Period			655,000
Consumer [Member] | Other Restructuring [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivables, COVID Modifications, Recorded Investment, During Period			1,700,000
Commercial Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Modifications, Recorded Investment, During Period	100,000		200,000	$ 0
Financing Receivables, COVID Modifications, Recorded Investment, During Period	386,900,000		635,000,000.0
Commercial Portfolio Segment [Member] | Covid Restructuring [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivables, COVID Modifications, Recorded Investment, During Period			82,000
Commercial Portfolio Segment [Member] | Other Restructuring [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivables, COVID Modifications, Recorded Investment, During Period			6,100,000
Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Business Combination, Acquired Receivable, Fair Value	2,100,000		2,100,000		3,000,000.0	18,400,000	4,900,000
Business Combination, Acquired Receivables, Gross Contractual Amount	2,300,000		2,300,000		3,200,000	$ 19,900,000	$ 5,100,000
NewDominion [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Allowance for Loan and Lease Losses, Loans Acquired			5,000		101,000
Carolina Alliance [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Business Combination, Acquired Receivable, Fair Value	10,400,000		10,400,000		11,300,000
Business Combination, Acquired Receivables, Gross Contractual Amount	$ 12,800,000		12,800,000		13,800,000
Allowance for Loan and Lease Losses, Loans Acquired			$ 101,000		$ 167,000