Business Combinations - Recognized Intangible Assets, Goodwill and Earn-Out Provisions (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Oct. 01, 2020	May 04, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill	$ 939,249	$ 949,037			$ 952,404
Contingent Earn-Out Provision	$ 2,557	0			$ 10,095
Final Allocation
Business Acquisition [Line Items]
Goodwill		13,122
Intangible Assets		1,670
Contingent Earn-Out Provision		$ 2,560
Final Allocation | Trimax
Business Acquisition [Line Items]
Goodwill				$ 9,930
Intangible Assets				873
Contingent Earn-Out Provision				$ 2,560
Final Allocation | AssureEdge
Business Acquisition [Line Items]
Goodwill			$ 3,192
Intangible Assets			797
Contingent Earn-Out Provision			$ 0