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Fair Value Measurements (Available for Sale) (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | $ 223,300 | $ 222,134
Unrealized Gains | 741 | 1,272
Unrealized Losses | (5,928) | (6,158)
Fair Value | 218,113 | 217,248
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 Months, Fair Value | 50,289 | 17,748
Less than 12 Months, Unrealized Losses | (272) | (64)
12 Months or Greater, Fair Value | 105,580 | 120,731
12 Months or Greater, Unrealized Losses | (5,656) | (6,094)
Total, Fair Value | 155,869 | 138,479
Total, Unrealized Losses | (5,928) | (6,158)
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract] |  |
Amortized Cost, Due within one year | 38,792 |
Fair Value, Due within one year | 38,009 |
Amortized Cost, Due after one year through five years | 174,478 |
Fair Value, Due after one year through five years | 171,095 |
Amortized Cost, Due after five years | 10,030 |
Fair Value, Due after five years | 9,009 |
Restricted investments: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 134,342 | 133,710
Unrealized Gains | 403 | 785
Unrealized Losses | (4,246) | (4,208)
Fair Value | 130,499 | 130,287
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 Months, Fair Value | 25,575 | 6,350
Less than 12 Months, Unrealized Losses | (147) | (9)
12 Months or Greater, Fair Value | 59,655 | 71,005
12 Months or Greater, Unrealized Losses | (4,099) | (4,199)
Total, Fair Value | 85,230 | 77,355
Total, Unrealized Losses | (4,246) | (4,208)
Investments in lieu of retention: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 88,958 | 88,424
Unrealized Gains | 338 | 487
Unrealized Losses | (1,682) | (1,950)
Fair Value | 87,614 | 86,961
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 Months, Fair Value | 24,714 | 11,398
Less than 12 Months, Unrealized Losses | (125) | (55)
12 Months or Greater, Fair Value | 45,925 | 49,726
12 Months or Greater, Unrealized Losses | (1,557) | (1,895)
Total, Fair Value | 70,639 | 61,124
Total, Unrealized Losses | (1,682) | (1,950)
Corporate debt securities | Restricted investments: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 101,568 | 95,903
Unrealized Gains | 395 | 762
Unrealized Losses | (2,257) | (2,202)
Fair Value | 99,706 | 94,463
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 Months, Fair Value | 22,242 | 4,971
Less than 12 Months, Unrealized Losses | (123) | (3)
12 Months or Greater, Fair Value | 37,507 | 40,649
12 Months or Greater, Unrealized Losses | (2,134) | (2,199)
Total, Fair Value | 59,749 | 45,620
Total, Unrealized Losses | (2,257) | (2,202)
Corporate debt securities | Investments in lieu of retention: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 88,134 | 87,601
Unrealized Gains | 105 | 246
Unrealized Losses | (1,682) | (1,950)
Fair Value | 86,557 | 85,897
U.S. government agency securities | Restricted investments: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 24,380 | 29,082
Unrealized Gains | 4 | 18
Unrealized Losses | (1,050) | (1,054)
Fair Value | 23,334 | 28,046
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 Months, Fair Value | 3,333 | 1,280
Less than 12 Months, Unrealized Losses | (24) | (4)
12 Months or Greater, Fair Value | 14,869 | 22,858
12 Months or Greater, Unrealized Losses | (1,026) | (1,050)
Total, Fair Value | 18,202 | 24,138
Total, Unrealized Losses | (1,050) | (1,054)
Municipal bonds | Restricted investments: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 7,899 | 8,227
Unrealized Gains | 4 | 5
Unrealized Losses | (908) | (914)
Fair Value | 6,995 | 7,318
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 Months, Fair Value | 0 | 99
Less than 12 Months, Unrealized Losses | 0 | (2)
12 Months or Greater, Fair Value | 6,814 | 7,038
12 Months or Greater, Unrealized Losses | (908) | (912)
Total, Fair Value | 6,814 | 7,137
Total, Unrealized Losses | (908) | (914)
Municipal bonds | Investments in lieu of retention: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 824 | 823
Unrealized Gains | 233 | 241
Unrealized Losses | 0 | 0
Fair Value | 1,057 | 1,064
Corporate certificates of deposit | Restricted investments: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 495 | 498
Unrealized Gains | 0 | 0
Unrealized Losses | (31) | (38)
Fair Value | 464 | 460
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 Months, Fair Value | 0 | 0
Less than 12 Months, Unrealized Losses | 0 | 0
12 Months or Greater, Fair Value | 465 | 460
12 Months or Greater, Unrealized Losses | (31) | (38)
Total, Fair Value | 465 | 460
Total, Unrealized Losses | $ (31) | $ (38)

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