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Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Cash Flows from Operating Activities |  |
Net income | $ 2,436 | $ 1,705
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization of premises and equipment | 323 | 327
Amortization of core deposit intangibles | 14 | 52
Amortization of debt issuance costs | 1 | 4
Origination of loans held for sale | (318) | (2,133)
Proceeds from sale of loans held for sale | 570 | 1,710
Net gains on sales of loans held for sale | (7) | (31)
Provision for loan losses |  | 900
Net gains on securities available for sale | (37) |
Increase in cash value of bank owned life insurance | (113) | (115)
Accretion of discounts and amortization of premiums on securities, net | 214 | 157
Accretion of premium on time deposits | (3) | (12)
Stock-based compensation | 74 | 132
Excess tax deficiency (benefit) on stock-based compensation | 3 | (2)
Gains on disposal of premises and equipment | (12) | (9)
Deferred income tax benefit | (95) | (170)
Changes in assets and liabilities: |  |
Decrease (increase) in interest receivable | 108 | (59)
(Increase) decrease in other assets | (700) | 610
Increase in accrued interest payable and other liabilities | 2,592 | 320
Net cash provided by operating activities | 5,050 | 3,386
Cash Flows from Investing Activities |  |
Proceeds from maturities, calls, principal payments, and sales of securities available for sale | 13,425 | 5,318
Proceeds from maturities, calls, and principal payments of securities held to maturity | 786 | 516
Purchase of securities available for sale | (35,189) | (10,479)
Net redemption (purchase) of restricted securities | 244 | (42)
Purchase of premises and equipment | (91) | (199)
Proceeds from sale of premises and equipment | 12 | 9
Net increase in loans | (8,287) | (7,771)
Net cash used in investing activities | (29,100) | (12,648)
Cash Flows from Financing Activities |  |
Net increase in demand deposits and savings accounts | 76,028 | 16,339
Net decrease in time deposits | (2,429) | (2,142)
Cash dividends paid on common stock, net of reinvestment | (545) | (512)
Net cash provided by financing activities | 73,015 | 11,567
Increase in cash and cash equivalents | 48,965 | 2,305
Cash and Cash Equivalents |  |
Beginning | 127,297 | 45,785
Ending | 176,262 | 48,090
Supplemental Disclosures of Cash Flow Information |  |
Interest | 543 | 1,169
Supplemental Disclosures of Noncash Investing and Financing Activities |  |
Unrealized (losses) gains on securities available for sale | (2,094) | 2,648
Change in fair value of cash flow hedges | 934 |
Issuance of common stock, dividend reinvestment plan | 39 | 35
First National Corporation 2014 Stock Incentive Plan [Member] |  |
Cash Flows from Financing Activities |  |
Repurchase of common stock | (39) | (47)
Stock Repurchase Plan [Member] |  |
Cash Flows from Financing Activities |  |
Repurchase of common stock |  | $ (2,071)

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