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Parent Company Only Financial Statements (Tables) | 12 Months Ended
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Dec. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract] |
Balance Sheets | FIRST NATIONAL CORPORATION (Parent Company Only) Balance Sheets December 31, 2017 and 2016 (in thousands)
| 2017 |  | 2016
Assets |  |  |
Cash | $ | 9,964 |  |  | $ | 5,690 |
Investment in subsidiaries, at cost, plus undistributed net income | 62,094 |  |  | 60,344 |
Other assets | 327 |  |  | 335 |
Total assets | $ | 72,385 |  |  | $ | 66,369 |
Liabilities and Shareholders’ Equity |  |  |
Subordinated debt | $ | 4,948 |  |  | $ | 4,930 |
Junior subordinated debt | 9,279 |  |  | 9,279 |
Other liabilities | 4 |  |  | 9 |
Total liabilities | $ | 14,231 |  |  | $ | 14,218 |
Preferred stock | $ | — |  |  | $ | — |
Common stock | 6,182 |  |  | 6,162 |
Surplus | 7,260 |  |  | 7,093 |
Retained earnings | 45,670 |  |  | 39,756 |
Accumulated other comprehensive loss, net | (958 | ) |  | (860 | )
Total shareholders’ equity | $ | 58,154 |  |  | $ | 52,151 |
Total liabilities and shareholders’ equity | $ | 72,385 |  |  | $ | 66,369 |
Statements of Income | FIRST NATIONAL CORPORATION (Parent Company Only) Statements of Income Years Ended December 31, 2017 and 2016 (in thousands)
| 2017 |  | 2016
Income |  |  |
Dividends from subsidiary | $ | 5,500 |  |  | $ | 2,325 |
Other income | 13 |  |  | — |
Total income | $ | 5,513 |  |  | $ | 2,325 |
Expense |  |  |
Interest expense | $ | 663 |  |  | $ | 620 |
Marketing | 13 |  |  | — |
Supplies | 3 |  |  | 2 |
Legal and professional fees | 113 |  |  | 104 |
Data processing | 62 |  |  | 61 |
Management fee-subsidiary | 265 |  |  | 258 |
Other expense | 8 |  |  | 17 |
Total expense | $ | 1,127 |  |  | $ | 1,062 |
Income before allocated tax benefits and undistributed income of subsidiary | $ | 4,386 |  |  | $ | 1,263 |
Allocated income tax benefit | 379 |  |  | 361 |
Income before equity in undistributed income of subsidiary | $ | 4,765 |  |  | $ | 1,624 |
Equity in undistributed income of subsidiary | 1,683 |  |  | 4,283 |
Net income | $ | 6,448 |  |  | $ | 5,907 |
Statements of Cash Flows | FIRST NATIONAL CORPORATION (Parent Company Only) Statements of Cash Flows Years Ended December 31, 2017 and 2016 (in thousands)
| 2017 |  | 2016
Cash Flows from Operating Activities |  |  |
Net income | $ | 6,448 |  |  | $ | 5,907 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Equity in undistributed income of subsidiary | (1,683 | ) |  | (4,283 | )
Amortization of debt issuance costs | 18 |  |  | 17 |
(Increase) decrease in other assets | (3 | ) |  | 74 |
Decrease in other liabilities | (1 | ) |  | — |
Net cash provided by operating activities | $ | 4,779 |  |  | $ | 1,715 |
Cash Flows from Financing Activities |  |  |
Cash dividends paid on common stock, net of reinvestment | $ | (646 | ) |  | $ | (550 | )
Net proceeds from issuance of common stock | 141 |  |  | 113 |
Net cash used in financing activities | $ | (505 | ) |  | $ | (437 | )
Increase in cash and cash equivalents | $ | 4,274 |  |  | $ | 1,278 |
Cash and Cash Equivalents |  |  |
Beginning | 5,690 |  |  | 4,412 |
Ending | $ | 9,964 |  |  | $ | 5,690 |

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