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Operations and Summary of Significant Accounting Policies - Narrative (Details) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) | Dec. 31, 2023 USD ($) segment | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Number of reportable segments | segment |  |  |  | 2 |  |
Cash |  |  |  | $ 111,969,000 | $ 30,743,000 |
Cash equivalents |  |  |  | 10,000,000 | 15,079,000 |
Average monthly revenue adjustments |  |  |  | 424,000 |  |
Average monthly revenue |  |  |  | $ 114,228,000 |  |
Average monthly revenue adjustments as a percentage of monthly revenue |  |  |  | 0.40% |  |
Property and Equipment |  |  |  |  |  |
Capitalized computer software, net |  |  |  | $ 7,361,000 | 8,737,000 |
Capitalized computer software, amortization |  |  |  | 2,909,000 | 2,558,000 | $ 2,394,000
Long-lived asset impairment | $ 0 | $ 0 | $ 0 |  |  |
Goodwill impairment | $ 0 | $ 0 | $ 0 |  |  |
Goodwill accumulated impairment |  |  |  | 25,686,000 |  |
Goodwill tax deductible |  |  |  | 247,760,000 |  |
Amortization |  |  |  | 16,039,000 | 12,213,000 | 10,539,000
Intangible assets, estimated future amortization |  |  |  |  |  |
2024 |  |  |  | 16,053,000 |  |
2025 |  |  |  | 16,052,000 |  |
2026 |  |  |  | 16,030,000 |  |
2027 |  |  |  | 15,958,000 |  |
2028 |  |  |  | 15,701,000 |  |
Liability insurance coverage |  |  |  | 100,000 |  |
Self-insurance retention workers' compensation |  |  |  | 500,000 |  |
Self insurance reserve |  |  |  | 66,374,000 | 67,860,000 |
Insurance and claims accruals |  |  |  | 19,566,000 | 19,167,000 |
Self insurance reserve, noncurrent |  |  |  | 46,808,000 | 48,693,000 |
Insurance settlements receivable |  |  |  | $ 26,712,000 | 29,087,000 |
Share-based awards, vesting period (in years) |  |  |  | 3 years |  |
Other operating expenses |  |  |  | $ 0 | $ 0 | $ 434,000
Employee Stock Option |  |  |  |  |  |
Intangible assets, estimated future amortization |  |  |  |  |  |
Share-based awards, vesting period (in years) |  |  |  | 3 years |  |
Computer software |  |  |  |  |  |
Property and Equipment |  |  |  |  |  |
Property and equipment, useful life (in years) |  |  |  | 5 years |  |
Minimum |  |  |  |  |  |
Property and Equipment |  |  |  |  |  |
Capitalized computer software, amortization period (in years) |  |  |  | 3 years |  |
Estimated useful life (in years) |  |  |  | 20 years |  |
Minimum | Buildings and improvements |  |  |  |  |  |
Property and Equipment |  |  |  |  |  |
Property and equipment, useful life (in years) |  |  |  | 30 years |  |
Minimum | Equipment |  |  |  |  |  |
Property and Equipment |  |  |  |  |  |
Property and equipment, useful life (in years) |  |  |  | 3 years |  |
Maximum |  |  |  |  |  |
Property and Equipment |  |  |  |  |  |
Capitalized computer software, amortization period (in years) |  |  |  | 5 years |  |
Estimated useful life (in years) |  |  |  | 1 year |  |
Maximum | Aggregate deductible for claims between $5,000 and $10,000 |  |  |  |  |  |
Intangible assets, estimated future amortization |  |  |  |  |  |
Layer |  |  |  | $ 10,000,000 |  |
Maximum | Buildings and improvements |  |  |  |  |  |
Property and Equipment |  |  |  |  |  |
Property and equipment, useful life (in years) |  |  |  | 40 years |  |
Maximum | Equipment |  |  |  |  |  |
Property and Equipment |  |  |  |  |  |
Property and equipment, useful life (in years) |  |  |  | 10 years |  |

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