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Loans and Allowance for Loan Losses (Impaired Loan Portfolio) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Financing Receivable, Impaired [Line Items] |  |
Impaired loans with a valuation allowance, Related Allowance | $ 534 | $ 461
Total impaired loans, Recorded Investment | 3,559 | 2,657
Total impaired loans, Unpaid Principal Balance | 3,652 | 2,826
Total impaired loans, Average Recorded Investment | 3,358 | 2,005
Total impaired loans, Interest Income Recognized | 111 | 129
All Other Loans [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans without a valuation allowance, Recorded Investment | 2,354 | 1,427
Impaired loans without a valuation allowance, Unpaid Principal Balance | 2,387 | 1,462
Impaired loans without a valuation allowance, Average Recorded Investment | 2,420 | 1,277
Impaired loans without a valuation allowance, Interest Income Recognized | 71 | 63
Impaired loans with a valuation allowance, Recorded Investment | 1,205 | 1,214
Impaired loans with a valuation allowance, Unpaid Principal Balance | 1,265 | 1,241
Impaired loans with a valuation allowance, Related Allowance | 534 | 445
Impaired loans with a valuation allowance, Average Recorded Investment | 927 | 725
Impaired loans with a valuation allowance, Interest Income Recognized | 40 | 50
All Other Loans [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans without a valuation allowance, Recorded Investment | 636 | 424
Impaired loans without a valuation allowance, Unpaid Principal Balance | 648 | 454
Impaired loans without a valuation allowance, Average Recorded Investment | 855 | 204
Impaired loans without a valuation allowance, Interest Income Recognized | 33 | 44
Impaired loans with a valuation allowance, Recorded Investment | 0 | 23
Impaired loans with a valuation allowance, Unpaid Principal Balance | 0 | 23
Impaired loans with a valuation allowance, Related Allowance | 0 | 5
Impaired loans with a valuation allowance, Average Recorded Investment | 0 | 5
Impaired loans with a valuation allowance, Interest Income Recognized | 0 | 1
All Other Loans [Member] | Consumer Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans without a valuation allowance, Recorded Investment | 1,073 | 415
Impaired loans without a valuation allowance, Unpaid Principal Balance | 1,089 | 420
Impaired loans without a valuation allowance, Average Recorded Investment | 934 | 401
Impaired loans without a valuation allowance, Interest Income Recognized | 29 | 16
Impaired loans with a valuation allowance, Recorded Investment | 163 | 1,007
Impaired loans with a valuation allowance, Unpaid Principal Balance | 205 | 1,033
Impaired loans with a valuation allowance, Related Allowance | 26 | 256
Impaired loans with a valuation allowance, Average Recorded Investment | 365 | 601
Impaired loans with a valuation allowance, Interest Income Recognized | 0 | 38
All Other Loans [Member] | Construction and Land Development [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans without a valuation allowance, Recorded Investment | 547 | 547
Impaired loans without a valuation allowance, Unpaid Principal Balance | 547 | 547
Impaired loans without a valuation allowance, Average Recorded Investment | 547 | 628
Impaired loans without a valuation allowance, Interest Income Recognized | 0 | 0
Impaired loans with a valuation allowance, Recorded Investment | 0 | 0
Impaired loans with a valuation allowance, Unpaid Principal Balance | 0 | 0
Impaired loans with a valuation allowance, Related Allowance | 0 | 0
Impaired loans with a valuation allowance, Average Recorded Investment | 0 | 0
Impaired loans with a valuation allowance, Interest Income Recognized | 0 | 0
All Other Loans [Member] | Commercial and Industrial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans without a valuation allowance, Recorded Investment | 69 | 41
Impaired loans without a valuation allowance, Unpaid Principal Balance | 70 | 41
Impaired loans without a valuation allowance, Average Recorded Investment | 69 | 44
Impaired loans without a valuation allowance, Interest Income Recognized | 6 | 3
Impaired loans with a valuation allowance, Recorded Investment | 955 | 172
Impaired loans with a valuation allowance, Unpaid Principal Balance | 973 | 172
Impaired loans with a valuation allowance, Related Allowance | 442 | 172
Impaired loans with a valuation allowance, Average Recorded Investment | 476 | 117
Impaired loans with a valuation allowance, Interest Income Recognized | 37 | 10
All Other Loans [Member] | Consumer and Other [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans without a valuation allowance, Recorded Investment | 29 | 0
Impaired loans without a valuation allowance, Unpaid Principal Balance | 33 | 0
Impaired loans without a valuation allowance, Average Recorded Investment | 15 | 0
Impaired loans without a valuation allowance, Interest Income Recognized | 3 | 0
Impaired loans with a valuation allowance, Recorded Investment | 87 | 12
Impaired loans with a valuation allowance, Unpaid Principal Balance | 87 | 13
Impaired loans with a valuation allowance, Related Allowance | 66 | 12
Impaired loans with a valuation allowance, Average Recorded Investment | 86 | 2
Impaired loans with a valuation allowance, Interest Income Recognized | 3 | 1
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans with a valuation allowance, Recorded Investment | 0 | 16
Impaired loans with a valuation allowance, Unpaid Principal Balance | 0 | 123
Impaired loans with a valuation allowance, Related Allowance | 0 | 16
Impaired loans with a valuation allowance, Average Recorded Investment | 11 | 3
Impaired loans with a valuation allowance, Interest Income Recognized | $ 0 | $ 16

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