PCI Loans and Related Allowance for Loan Losses (Summary of Covered Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net	$ 29,507	$ 32,528
Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net	29,507	32,528
Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net	26,531	29,465
Commercial [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net	470	490
Construction and Land Development [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net	1,127	1,172
Second Mortgages [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net	1,156	1,169
Multifamily [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net	223	232
Purchase Credit Impaired (PCI) Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net	$ 29,507	$ 32,528
Percent of purchased credit impaired loan	100.00%	100.00%
Purchase Credit Impaired (PCI) Loans [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net	$ 29,507	$ 32,528
Percent of purchased credit impaired loan	100.00%	100.00%
Purchase Credit Impaired (PCI) Loans [Member] | Residential 1-4 Family [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net	$ 26,531	$ 29,465
Percent of purchased credit impaired loan	89.91%	90.58%
Purchase Credit Impaired (PCI) Loans [Member] | Commercial [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net	$ 470	$ 490
Percent of purchased credit impaired loan	1.59%	1.51%
Purchase Credit Impaired (PCI) Loans [Member] | Construction and Land Development [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net	$ 1,127	$ 1,172
Percent of purchased credit impaired loan	3.82%	3.60%
Purchase Credit Impaired (PCI) Loans [Member] | Second Mortgages [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net	$ 1,156	$ 1,169
Percent of purchased credit impaired loan	3.92%	3.59%
Purchase Credit Impaired (PCI) Loans [Member] | Multifamily [Member] | Mortgage Loans on Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net	$ 223	$ 232
Percent of purchased credit impaired loan	0.76%	0.72%