Acquisitions - Additional Information (Details)			3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 18, 2021 USD ($) $ / shares shares	Jun. 08, 2021 USD ($) $ / shares	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) Business	Jun. 30, 2020 USD ($)	Dec. 31, 2020
Business Acquisition [Line Items]
Business acquisition, goodwill recognized , expected to be tax deductible for income tax purposes			$ 80,400,000		$ 80,400,000
Acquisition-related transaction costs			149,000	$ 0	149,000	$ 0
Cash consideration					210,252,000	0
Equity consideration issued in acquisitions					161,193,000	0
Revenue			44,919,000	25,795,000	72,837,000	51,029,000
Net income loss before income taxes			10,057,000	$ 3,464,000	$ 11,359,000	$ 6,638,000
Risk Contracts
Business Acquisition [Line Items]
Definite-lived intangible assets amortized period					7 years		11 years
IMC
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired		100.00%
Total purchase consideration		$ 369,700,000
Definite-lived intangible assets		34,100,000
Cash consideration		172,302,000			$ 172,302,000
Equity consideration issued in acquisitions		$ 155,347,000			155,347,000
Business acquisition, share price | $ / shares		$ 10.00
Revenue					17,000,000.0
Net income loss before income taxes					201,000
IMC | Minimum
Business Acquisition [Line Items]
Definite-lived intangible assets amortized period		1 year
IMC | Maximum
Business Acquisition [Line Items]
Definite-lived intangible assets amortized period		6 years
IMC | Risk Contracts
Business Acquisition [Line Items]
Definite-lived intangible assets		$ 33,900,000
IMC | Tradenames
Business Acquisition [Line Items]
Definite-lived intangible assets		$ 263,000
SMA Entities
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired	100.00%
Total purchase consideration	$ 57,000,000.0
Business acquisition, goodwill recognized , expected to be tax deductible for income tax purposes			$ 46,300,000		46,300,000
Acquisition-related transaction costs	149,000
Definite-lived intangible assets	8,800,000
Cash consideration	52,000,000.0
Business combination holdback amount	$ 2,500,000
Business acquisition, equity interest issued number of shares | shares	384,615
Equity consideration issued in acquisitions	$ 5,000,000.0
Business acquisition, share price | $ / shares	$ 13.07
Revenue					817,000
Net income loss before income taxes					$ 147,000
SMA Entities | Minimum
Business Acquisition [Line Items]
Definite-lived intangible assets amortized period	1 year
SMA Entities | Maximum
Business Acquisition [Line Items]
Definite-lived intangible assets amortized period	6 years
SMA Entities | Risk Contracts
Business Acquisition [Line Items]
Definite-lived intangible assets	$ 8,700,000
SMA Entities | Tradenames
Business Acquisition [Line Items]
Definite-lived intangible assets	$ 92,000
Other Acquisitions
Business Acquisition [Line Items]
Business acquisition, percentage of equity interests acquired			100.00%		100.00%
Total purchase consideration					$ 375,000
Definite-lived intangible assets			$ 157,000		$ 157,000
Number of additional business acquired | Business					1