Business Combinations PSL (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Jun. 17, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Dec. 31, 2020
Business Acquisition [Line Items]
Adjustment to fair value of contingent consideration		$ 42	$ 2,061	$ 46		$ 3,793
Goodwill		438,173		438,173			$ 427,928
Increase to acquired tangible assets					$ 500
Decrease to identified intangible assets					(400)
Increase to liabilities assumed					(1,700)
Increase to goodwill					2,700
PSL
Business Acquisition [Line Items]
Date of acquisition	Jun. 17, 2020
Total purchase price	$ 83,100
Cash paid for acquisition	60,800
Company common stock issued at closing	4,500
Net working capital settlement	100
Initial fair value estimate of additional earnings-based contingent consideration	17,700
Contingent consideration, maximum cash payout	22,200
Fair value of contingent consideration		$ 20,900		20,900
Adjustment to fair value of contingent consideration				$ (600)
Transaction costs	2,100
Acquired tangible assets	11,600
Identified intangible assets	29,600
Liabilities assumed	(17,700)
Goodwill	$ 59,600
Increase to the total purchase price					$ 1,100