Business Combinations - Additional Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) segment	Jun. 30, 2020 USD ($) segment
Business Acquisition [Line Items]
Number of businesses acquired | segment			5	3
Acquisition-related costs	$ 700	$ 500	$ 1,900	$ 1,200
Goodwill deduction for tax purposes	7,800		7,800
Amortization	9,178	6,724	17,574	13,404
Income tax expense	8,962	9,121	15,112	14,805
Combined Business Acquisitions
Business Acquisition [Line Items]
Amortization	200	2,900	1,100	6,000
Income tax expense	$ 100	$ 700	$ 500	$ 1,500