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Fair Value Measurements (Available for Sale) (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | $ 187,217 | $ 169,876
Unrealized Gains | 152 | 180
Unrealized Losses | (9,639) | (10,272)
Fair Value | 177,730 | 159,784
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 Months, Fair Value | 57,186 | 88,007
Less than 12 Months, Unrealized Losses | (946) | (3,199)
12 Months or Greater, Fair Value | 114,040 | 67,173
12 Months or Greater, Unrealized Losses | (8,693) | (7,073)
Total, Fair Value | 171,226 | 155,180
Total, Unrealized Losses | (9,639) | (10,272)
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract] |  |
Amortized Cost, Due within one year | 32,555 |
Fair Value, Due within one year | 32,007 |
Amortized Cost, Due after one year through five years | 142,227 |
Fair Value, Due after one year through five years | 134,927 |
Amortized Cost, Due after five years | 12,435 |
Fair Value, Due after five years | 10,796 |
Restricted investments: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 104,877 | 98,090
Unrealized Gains | 0 | 14
Unrealized Losses | (6,516) | (6,548)
Fair Value | 98,361 | 91,556
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 Months, Fair Value | 28,680 | 53,454
Less than 12 Months, Unrealized Losses | (587) | (2,356)
12 Months or Greater, Fair Value | 65,091 | 34,782
12 Months or Greater, Unrealized Losses | (5,929) | (4,192)
Total, Fair Value | 93,771 | 88,236
Total, Unrealized Losses | (6,516) | (6,548)
Investments in lieu of retention: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 82,340 | 71,786
Unrealized Gains | 152 | 166
Unrealized Losses | (3,123) | (3,724)
Fair Value | 79,369 | 68,228
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 Months, Fair Value | 28,506 | 34,553
Less than 12 Months, Unrealized Losses | (359) | (843)
12 Months or Greater, Fair Value | 48,949 | 32,391
12 Months or Greater, Unrealized Losses | (2,764) | (2,881)
Total, Fair Value | 77,455 | 66,944
Total, Unrealized Losses | (3,123) | (3,724)
Corporate debt securities | Restricted investments: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 66,046 | 53,452
Unrealized Gains | 0 | 1
Unrealized Losses | (3,638) | (3,550)
Fair Value | 62,408 | 49,903
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 Months, Fair Value | 20,382 | 23,559
Less than 12 Months, Unrealized Losses | (495) | (733)
12 Months or Greater, Fair Value | 39,026 | 25,842
12 Months or Greater, Unrealized Losses | (3,143) | (2,817)
Total, Fair Value | 59,408 | 49,401
Total, Unrealized Losses | (3,638) | (3,550)
Corporate debt securities | Investments in lieu of retention: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 81,518 | 70,968
Unrealized Gains | 1 | 1
Unrealized Losses | (3,123) | (3,724)
Fair Value | 78,396 | 67,245
U.S. government agency securities | Restricted investments: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 29,724 | 34,920
Unrealized Gains | 0 | 13
Unrealized Losses | (1,599) | (1,688)
Fair Value | 28,125 | 33,245
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 Months, Fair Value | 8,112 | 24,834
Less than 12 Months, Unrealized Losses | (89) | (939)
12 Months or Greater, Fair Value | 18,763 | 5,593
12 Months or Greater, Unrealized Losses | (1,510) | (749)
Total, Fair Value | 26,875 | 30,427
Total, Unrealized Losses | (1,599) | (1,688)
Municipal bonds | Restricted investments: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 8,607 | 9,211
Unrealized Gains | 0 | 0
Unrealized Losses | (1,230) | (1,257)
Fair Value | 7,377 | 7,954
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 Months, Fair Value | 186 | 4,998
Less than 12 Months, Unrealized Losses | (3) | (672)
12 Months or Greater, Fair Value | 6,851 | 2,956
12 Months or Greater, Unrealized Losses | (1,227) | (585)
Total, Fair Value | 7,037 | 7,954
Total, Unrealized Losses | (1,230) | (1,257)
Municipal bonds | Investments in lieu of retention: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 822 | 818
Unrealized Gains | 151 | 165
Unrealized Losses | 0 | 0
Fair Value | 973 | 983
Corporate certificates of deposit | Restricted investments: |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Amortized Cost | 500 | 507
Unrealized Gains | 0 | 0
Unrealized Losses | (49) | (53)
Fair Value | 451 | 454
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 Months, Fair Value | 0 | 63
Less than 12 Months, Unrealized Losses | 0 | (12)
12 Months or Greater, Fair Value | 451 | 391
12 Months or Greater, Unrealized Losses | (49) | (41)
Total, Fair Value | 451 | 454
Total, Unrealized Losses | $ (49) | $ (53)

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