Description of the Business and Basis of Presentation - Additional Information (Details) $ / shares in Units, $ in Thousands		6 Months Ended
	Jul. 27, 2020 USD ($) $ / shares shares	Jun. 30, 2020 USD ($) Employee Office Acquisition $ / shares	Jun. 30, 2019 USD ($) $ / shares
Description Of Business And Basis Of Presentation [Line Items]
Entity formation, month and year		2013-11
Number of offices in which entity operates | Office		70
Entity number of employees | Employee		1,700
Number of acquisitions completed | Acquisition		54
Share price | $ / shares		$ 31.60	$ 26.90
Net proceeds from sale of common stock | $		$ 21	$ 95
Subsequent Event
Description Of Business And Basis Of Presentation [Line Items]
Common stock shares sold under IPO	1,786,739
Subsequent Event | IPO
Description Of Business And Basis Of Presentation [Line Items]
Common stock shares sold under IPO	11,500,000
Share price | $ / shares	$ 15.00
Net proceeds from sale of common stock | $	$ 161,300
Subsequent Event | Underwriters
Description Of Business And Basis Of Presentation [Line Items]
Common stock shares sold under IPO	1,500,000