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Business Acquisitions and Dispositions - Additional Information (Details) - USD ($) |  |  |  |  |  |  |  | 12 Months Ended
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Oct. 01, 2021 | Aug. 23, 2021 | Nov. 01, 2020 | Oct. 01, 2020 | Jul. 21, 2020 | Jun. 12, 2020 | Jun. 01, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Loss on disposal of entity |  |  |  |  |  |  |  | $ 0 | $ (13,763,000) | $ 0
Business combinations, total consideration |  |  |  |  |  |  |  | 14,600,000 | 6,151,000 | $ 454,000
Noncontrolling interests |  |  |  |  |  |  |  | (568,000) | (11,000) |
Crawford Carvallo |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Membership interest percentage |  |  |  | 85.00% |  |  |  |  |  |
Percentage of held interest prior to acquisition |  |  |  | 15.00% |  |  |  |  |  |
Initial lump-sum payment of purchase price |  |  |  | $ 11,583,000 |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  | 21,185,000 |  |
Business combinations, total consideration |  |  |  | 5,808,000 |  |  |  |  |  |
Business combination, deferred taxes |  |  |  |  |  |  |  | 2,237,000 |  |
Pretax gain recognized |  |  |  |  |  |  |  |  | 1,099,000 |
Noncontrolling interests |  |  |  | 489,000 |  |  |  |  | 3,047,000 |
HBA Group |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Membership interest percentage |  |  | 100.00% |  |  |  |  |  |  |
Initial lump-sum payment of purchase price |  |  | $ 4,026,000 |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  | 8,800,000 |  |
Business combinations, total consideration |  |  | 2,409,000 |  |  |  |  |  |  |
Edjuster Inc |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Membership interest percentage |  | 100.00% |  |  |  |  |  |  |  |
earnout potential amount |  | $ 13,334,000 |  |  |  |  |  |  |  |
Initial lump-sum payment of purchase price |  | 20,875,000 |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  | 5,000,000 |  |
Business combinations, total consideration |  | 2,437,000 |  |  |  |  |  |  |  |
Working capital adjustment payable |  | $ 433,000 |  |  |  |  |  |  |  |
Praxis Consulting Inc |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
business combination deferred cash payment | $ 20,000,000 |  |  |  |  |  |  |  |  |
Membership interest percentage | 100.00% |  |  |  |  |  |  |  |  |
earnout potential amount | $ 10,000,000 |  |  |  |  |  |  |  |  |
Initial lump-sum payment of purchase price | 21,544,000 |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  | 4,300,000 |  |
Business combinations, total consideration | 4,068,000 |  |  |  |  |  |  |  |  |
Working capital adjustment payable | 735,000 |  |  |  |  |  |  |  |  |
Bosboon Expertise Group B V |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
earnout potential amount | 1,854,000 |  |  |  |  |  |  |  |  |
Initial lump-sum payment of purchase price | 2,066,000 |  |  |  |  |  |  |  |  |
Business combinations, total consideration | $ 568,000 |  |  |  |  |  |  |  |  |
Maximum | Crawford Carvallo |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Payment to acquire business |  |  |  | $ 11,700,000 |  |  |  |  |  |
Maximum | HBA Group |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Payment to acquire business |  |  | $ 3,200,000 |  |  |  |  |  |  |
Crawford Compliance Inc. |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Variable interest entity, ownership percentage |  |  |  |  |  |  | 51.00% |  |  |
Loss on disposal of entity |  |  |  |  |  |  |  |  | 912,000 |
Lloyd Warwick International |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Variable interest entity, ownership percentage |  |  |  |  |  | 51.00% |  |  |  |
Loss on disposal of entity |  |  |  |  |  |  |  |  | (14,700,000) |
Consolidated variable interest entity investment |  |  |  |  |  | $ 19,600,000 |  |  |  |
Repayment of debt |  |  |  |  |  | $ 3,600,000 |  |  |  |
Working capital adjustments recognized under acquisition agreement |  |  |  |  |  |  |  | 700,000 |  |
Purchase price |  |  |  |  |  |  |  | 20,300,000 |  |
Gain on disposition, net of tax |  |  |  |  |  |  |  |  | 11,700,000 |
WeGoLook, LC |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Payment to acquire business |  |  |  |  | $ 310,000 |  |  |  |  |
Accelerated amortization amount recognized |  |  |  |  |  |  |  |  | $ 1,100,000 |
WeGoLook, LC | Global Technical Services |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Membership interest percentage |  |  |  |  | 15.00% |  |  |  |  |
Crawford Carvallo | HBA Group |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business combinations, total consideration |  |  |  |  |  |  |  | $ 2,044,000 |  |

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