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Parent Company (Franklin Financial Services Corporation) Condensed Financial Information (Statements Of Cash Flows) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Condensed Financial Statements, Captions [Line Items] |  |
Net income | $ 13,598 | $ 14,938
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Stock option compensation | 483 | 462
Deferred tax expense (benefit) | 1,140 | 1,172
Net cash provided by operating activities | 26,565 | 25,244
Dividends paid | (5,595) | (5,658)
Cash received from option exercises | 47 | 48
Treasury stock purchase | (2,394) | (3,334)
Net cash provided by (used in) financing activities | 109,943 | (40,439)
(Decrease) increase in cash and cash equivalents | (41,759) | (110,250)
Cash and cash equivalents at the beginning of the period | 64,899 |
Cash and cash equivalents at the end of the period | 23,140 | 64,899
Franklin Financial Services Corporation [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Net income | 13,598 | 14,938
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Equity in undistributed (income) of subsidiary | (10,012) | (11,550)
Stock option compensation | 483 | 462
Change in fair value of equity security | (16) | 69
Increase in other assets/liabilities | (896) | (528)
Net cash provided by operating activities | 3,157 | 3,391
Dividends paid | (5,595) | (5,658)
Cash received from option exercises | 47 | 48
Common stock issued under dividend reinvestment plan | 1,355 | 1,416
Treasury stock purchase | (2,394) | (3,334)
Net cash provided by (used in) financing activities | (6,587) | (7,528)
(Decrease) increase in cash and cash equivalents | (3,430) | (4,137)
Cash and cash equivalents at the beginning of the period | 13,500 | 17,637
Cash and cash equivalents at the end of the period | $ 10,070 | $ 13,500

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