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BUSINESS ACQUISITIONS - Narrative (Details) |  |  |  |  |  |  | 6 Months Ended | 8 Months Ended | 10 Months Ended | 12 Months Ended |
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Sep. 01, 2022 USD ($) rate | May 02, 2022 USD ($) | Mar. 01, 2022 USD ($) | Sep. 20, 2021 USD ($) | Jul. 01, 2021 USD ($) | Apr. 30, 2021 USD ($) | Sep. 01, 2022 USD ($) rate | Dec. 31, 2022 USD ($) | Dec. 31, 2022 USD ($) shares | Dec. 31, 2022 USD ($) entity | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  | $ 333,759,000 | $ 333,759,000 | $ 333,759,000 | $ 296,541,000 | $ 249,751,000
Acquired intangibles |  |  |  |  |  |  |  |  |  | 19,430,000 | 16,259,000 |
Acquisition related costs |  |  |  |  |  |  |  |  |  | 600,000 |  |
Measurement period adjustments to decrease goodwill |  |  |  |  |  |  |  |  |  | (4,000,000) |  |
Higher range of undiscounted amounts to pay under contingent consideration |  |  |  |  |  |  |  |  |  | $ 10,300,000 |  |
Non-compete agreements |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amortization term of acquired intangibles |  |  |  |  |  |  |  |  |  | 3 years 7 months 6 days |  |
Customer relationships |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amortization term of acquired intangibles |  |  |  |  |  |  |  |  |  | 6 years 1 month 6 days |  |
Total |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash and stock paid for acquisition |  |  |  |  |  |  |  |  | 67,900,000 |  |  |
Fair value of stock issued |  |  |  |  |  |  |  |  | 5,800,000 |  |  |
Contingent consideration |  |  |  |  |  |  |  |  | 8,200,000 |  |  |
Goodwill |  |  |  |  |  |  |  | 38,838,000 | 38,838,000 | $ 38,838,000 |  |
Acquired intangibles |  |  |  |  |  |  |  |  | $ 19,400,000 |  |  |
Number of completed acquisitions | entity |  |  |  |  |  |  |  |  |  | 4 |  |
Lower range of undiscounted amounts to pay under contingent consideration |  |  |  |  |  |  | $ 0 |  |  |  |  |
Higher range of undiscounted amounts to pay under contingent consideration |  |  |  |  |  |  | $ 10,300,000 |  |  |  |  |
Total | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Achievement of annual EBITDA target period |  |  |  |  |  |  | 1 year |  |  |  |  |
Total | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Achievement of annual EBITDA target period |  |  |  |  |  |  | 3 years |  |  |  |  |
Total | Common Stock |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in acquisitions (in shares) | shares |  |  |  |  |  |  |  |  | 267,248 |  |  |
Total | Fair Value, Inputs, Level 3 | Contingent Consideration Liability | Valuation, Weighted Probability Of Possible Payments |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Fair value of contingent consideration liability | $ 8,200,000 |  |  |  |  |  | $ 8,200,000 |  |  |  |  |
Discount rate | rate | 0.078 |  |  |  |  |  | 0.078 |  |  |  |  |
Total | Non-compete agreements |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Acquired intangibles |  |  |  |  |  |  |  |  | $ 1,400,000 |  |  |
Amortization term of acquired intangibles |  |  |  |  |  |  |  |  | 5 years |  |  |
Total | Customer relationships |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Acquired intangibles |  |  |  |  |  |  |  |  | $ 18,000,000 |  |  |
Amortization term of acquired intangibles |  |  |  |  |  |  |  |  | 8 years |  |  |
Sullivan |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash and stock paid for acquisition | $ 6,500,000 |  |  |  |  |  |  |  |  |  |  |
Cash on hand | 4,600,000 |  |  |  |  |  |  |  |  |  |  |
Fair value of stock issued | 900,000 |  |  |  |  |  |  |  |  |  |  |
Contingent consideration | $ 1,000,000 |  |  |  |  |  |  |  |  |  |  |
Sales contributed since acquisition |  |  |  |  |  |  |  |  |  | $ 1,000,000 |  |
Net income (loss) contributed since acquisition |  |  |  |  |  |  |  |  |  | 275,000 |  |
Goodwill |  |  |  |  |  |  |  | 2,500,000 | $ 2,500,000 | 2,500,000 |  |
Cisco |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash and stock paid for acquisition |  | $ 52,300,000 |  |  |  |  |  |  |  |  |  |
Cash on hand |  | 43,400,000 |  |  |  |  |  |  |  |  |  |
Fair value of stock issued |  | 4,400,000 |  |  |  |  |  |  |  |  |  |
Contingent consideration |  | 4,500,000 |  |  |  |  |  |  |  |  |  |
Sales contributed since acquisition |  |  |  |  |  |  |  |  |  | 32,100,000 |  |
Net income (loss) contributed since acquisition |  |  |  |  |  |  |  |  |  | 6,500,000 |  |
Goodwill |  | $ 34,465,000 |  |  |  |  |  | 30,494,000 | 30,494,000 | 30,494,000 |  |
Measurement period adjustments to decrease goodwill |  |  |  |  |  |  |  | (3,971,000) |  |  |  |
Drydon |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash and stock paid for acquisition |  |  | $ 7,900,000 |  |  |  |  |  |  |  |  |
Cash on hand |  |  | 4,900,000 |  |  |  |  |  |  |  |  |
Fair value of stock issued |  |  | 441,000 |  |  |  |  |  |  |  |  |
Contingent consideration |  |  | 2,600,000 |  |  |  |  |  |  |  |  |
Sales contributed since acquisition |  |  |  |  |  |  |  |  |  | 5,600,000 |  |
Net income (loss) contributed since acquisition |  |  |  |  |  |  |  |  |  | 1,100,000 |  |
Goodwill |  |  |  |  |  |  |  | 5,300,000 | 5,300,000 | 5,300,000 |  |
Burlingame |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash and stock paid for acquisition |  |  | $ 1,100,000 |  |  |  |  |  |  |  |  |
Sales contributed since acquisition |  |  |  |  |  |  |  |  |  | 2,900,000 |  |
Net income (loss) contributed since acquisition |  |  |  |  |  |  |  |  |  | 604,000 |  |
Goodwill |  |  |  |  |  |  |  | $ 500,000 | $ 500,000 | $ 500,000 |  |
CVI |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash and stock paid for acquisition |  |  |  |  |  | $ 49,700,000 |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  | 38,300,000 |
PMI |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash and stock paid for acquisition |  |  |  |  | $ 9,600,000 |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  | 5,300,000 |
Premier |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash and stock paid for acquisition |  |  |  | $ 5,800,000 |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  | $ 1,400,000 |

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