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Fair Value (Reconciliation Of Level 3 Input For Financial Instruments Measured On Recurring Basis) (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Investments, Fair Value Disclosure | $ 6,372 |  | $ 6,349 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Included in other comprehensive income | $ 22 | $ 0 |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Reconciliation Of Level 3 Input For Financial Instruments Measured On Recurring Basis | The following tables present a reconciliation of the beginning and ending balances of the Level 3 inputs for the three-month periods ended March 31, 2024 and 2023, for financial instruments measured on a recurring basis and classified as Level 3:
Level 3 Fair Value Measurements
Three months ended March 31, 2024 and 2023
(In thousands) |  | Corporate debt securities |  | Equity securities |  | Fair value swap
Balance at January 1, 2024 |  | $ | 6,349 |  |  | $ | 473 |  |  | $ | (123) |
Transfer into (out of) level 3 |  | — |  |  | — |  |  | — |
Total gains |  |  |  |  |  |
Included in other income |  | — |  |  | 22 |  |  | — |
Included in other comprehensive income |  | 23 |  |  | — |  |  | — |
Purchases, sales, issuances and settlements, other, net |  | — |  |  | — |  |  | — |
Balance at March 31, 2024 |  | $ | 6,372 |  |  | $ | 495 |  |  | $ | (123) |
Balance at January 1, 2023 |  | $ | 7,000 |  |  | $ | 439 |  |  | $ | (243) |
Transfer into level 3 |  | 622 |  | — |  |  | — |
Total gains / (losses) |  |  |  |  |  |
Included in other income |  | — |  |  | 10 |  |  | — |
Included in other comprehensive income |  | (767) |  |  | — |  |  | — |
Purchases, sales, issuances and settlements, other, net |  | — |  |  | — |  |  | 122 |
Balance at March 31, 2023 |  | $ | 6,855 |  |  | $ | 449 |  |  | $ | (121) |
Equity Securities [Member] |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Included in other comprehensive income |  | 10 |  |
Swap [Member] |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Included in other comprehensive income |  | 0 |  |
Corporate Debt Securities |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Investments, Fair Value Disclosure | $ 20,255 |  | 17,897 |
Fair Value, Recurring [Member] | Equity Securities [Member] |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Investments, Fair Value Disclosure | 2,092 |  | 2,089 |
Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) | 23 | (767) |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 | 0 |  |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Equity Securities [Member] |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Investments, Fair Value Disclosure | 495 |  | 473 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance, beginning | 495 | 449 | 473 | $ 439
Balance, ending | 495 | 449 | 473 | 439
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Swap [Member] |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance, beginning | (123) | (121) | (123) | (243)
Included in other comprehensive income | 0 |  |  |
Balance, ending | (123) | (121) | (123) | (243)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases, (Sales), Issuances, (Settlements) | 0 | 122 |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Balance, beginning | 6,372 | 6,855 | 6,349 | 7,000
Balance, ending | $ 6,372 | $ 6,855 | $ 6,349 | $ 7,000

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