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Credit Facility and Acquisition Debt (Narrative) (Details) | 12 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2022 USD ($) letter_of_credit | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023 | Dec. 09, 2022 USD ($) | May 27, 2022 USD ($) | Nov. 22, 2021 USD ($) | May 13, 2021 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Letters of Credit | letter_of_credit | 1 |  |  |  |  |  |  |  |  |  |
Debt instrument, term | 77 months |  |  |  |  |  |  |  |  |  |
Amortization of debt issuance costs | $ 552,000 | $ 576,000 | $ 782,000 |  |  |  |  |  |  |  |
Debt Issuance Costs, Gross | 600,000 |  |  |  |  |  |  | $ 200,000 |  |  | $ 300,000
Line Of Credit Facility Accordion Provision | 75,000,000 |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity | 57,000,000 |  |  |  |  |  |  |  |  |  |
Debt Issuance Costs, Net | $ 1,864,000 | 1,543,000 |  |  |  |  |  |  |  |  |
Line of Credit | Prime Rate Option |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument interest rate (in percent) | 2.375% |  |  |  |  |  |  |  |  |  |
Line of Credit | LIBOR Margin Option |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument interest rate (in percent) | 3.375% |  |  |  |  |  |  |  |  |  |
Deferred Purchase Price Notes |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest expense | $ 311,000 | 364,000 | 489,000 |  |  |  |  |  |  |  |
Deferred Purchase Price Notes | Minimum |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Deferred purchase price notes payable to sellers of acquired entities, discounted imputed interest rate (in Percent) | 7.30% |  |  |  |  |  |  |  |  |  |
Debt instrument, term | 5 years |  |  |  |  |  |  |  |  |  |
Deferred Purchase Price Notes | Maximum |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Deferred purchase price notes payable to sellers of acquired entities, discounted imputed interest rate (in Percent) | 10.00% |  |  |  |  |  |  |  |  |  |
Debt instrument, term | 20 years |  |  |  |  |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt | $ 190,700,000 |  |  |  |  |  |  |  |  |  |
Interest expense | 7,105,000 | 1,820,000 | 3,738,000 |  |  |  |  |  |  |  |
Amortization of debt issuance costs |  |  | 482,000 |  |  |  |  |  |  |  |
Letter of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 15,000,000.0 |  |  |  |  |  |  |  |  |
Swingline |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 10,000,000.0 |  |  |  |  |  |  |  |  |
Loans Payable |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amortization of debt issuance costs |  | 380,000 | $ 412,000 |  |  |  |  |  |  |  |
Credit Agreement Amendment |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  | $ 250,000,000 |  |
New Term Loan |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  | $ 200,000,000 |
Revolving Credit Facility, Secured, Floating Rate |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Present value of future deferred payments | 2,300,000 |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility, Secured, Floating Rate | Revolving Credit Facility | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt | $ 190,700,000 | $ 155,400,000 |  |  |  |  |  |  |  |  |
Revolving Credit Facility, Secured, Floating Rate | Revolving Credit Facility | Credit Agreement |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate During Period | 4.00% | 3.80% |  |  |  |  |  |  |  |  |
Ratio Actual |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ratio of indebtedness to net capital (in ratio) | 6.00 |  |  |  |  |  |  | 6.00 | 5.25 |  |
Ratio Actual | Forecast |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ratio of indebtedness to net capital (in ratio) |  |  |  | 5.00 | 5.25 | 5.50 | 5.75 |  |  |  |
Ratio Actual | Revolving Credit Facility, Secured, Floating Rate | Revolving Credit Facility | Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ratio of earnings to fixed cost obligations (in ratio) | 1.20 |  |  |  |  |  |  |  |  |  |

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