Allowance for Credit Losses (Collateral Dependent Loans) (Details)	Dec. 31, 2020 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable, collateral dependent, threshold for loans individually evaluated for impairment	$ 500,000
Financing Receivable, Collateral Dependent	58,825,000
Financing Receivable, Collateral, Net Realizable Value	$ 81,272,000
Financing Receivable, Collateral Coverage, Percentage	138.20%
Financing Receivable, Collateral Dependent, Allowance For Credit Loss	$ 131,000
Financing Receivable, Collateral Dependent, Nonaccrual, No Allowance	57,500,000
Financial Asset Acquired and No Credit Deterioration
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collateral Dependent	39,783,000
Financing Receivable, Collateral, Net Realizable Value	$ 53,400,000
Financing Receivable, Collateral Coverage, Percentage	134.20%
Financing Receivable, Collateral Dependent, Allowance For Credit Loss	$ 131,000
Financial Asset Acquired and No Credit Deterioration | Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collateral Dependent	16,772,000
Financing Receivable, Collateral, Net Realizable Value	$ 23,625,000
Financing Receivable, Collateral Coverage, Percentage	140.90%
Financing Receivable, Collateral Dependent, Allowance For Credit Loss	$ 0
PCD Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collateral Dependent	19,042,000
Financing Receivable, Collateral, Net Realizable Value	$ 27,872,000
Financing Receivable, Collateral Coverage, Percentage	146.40%
Financing Receivable, Collateral Dependent, Allowance For Credit Loss	$ 0
Construction and land development | Financial Asset Acquired and No Credit Deterioration | Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collateral Dependent	1,424,000
Financing Receivable, Collateral, Net Realizable Value	$ 1,795,000
Financing Receivable, Collateral Coverage, Percentage	126.10%
Financing Receivable, Collateral Dependent, Allowance For Credit Loss	$ 0
Mortgage Receivable, Owner Occupied | Financial Asset Acquired and No Credit Deterioration | Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collateral Dependent	9,792,000
Financing Receivable, Collateral, Net Realizable Value	$ 14,253,000
Financing Receivable, Collateral Coverage, Percentage	145.60%
Financing Receivable, Collateral Dependent, Allowance For Credit Loss	$ 0
Mortgage Receivable, Non-Owner Occupied | Financial Asset Acquired and No Credit Deterioration | Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collateral Dependent	5,556,000
Financing Receivable, Collateral, Net Realizable Value	$ 7,577,000
Financing Receivable, Collateral Coverage, Percentage	136.40%
Financing Receivable, Collateral Dependent, Allowance For Credit Loss	$ 0
Residential Mortgage | Financial Asset Acquired and No Credit Deterioration | Consumer Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Collateral Dependent	23,011,000
Financing Receivable, Collateral, Net Realizable Value	$ 29,775,000
Financing Receivable, Collateral Coverage, Percentage	129.40%
Financing Receivable, Collateral Dependent, Allowance For Credit Loss	$ 131,000