Significant Accounting Policies - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenues
Revenue	$ 253,125	$ 264,038	$ 799,683	$ 810,206
United States
Disaggregation of Revenues
Revenue	208,049	220,633	659,433	659,865
EMEA
Disaggregation of Revenues
Revenue	40,035	39,053	125,107	136,722
Other.
Disaggregation of Revenues
Revenue	5,041	4,352	15,143	13,619
ITPS
Disaggregation of Revenues
Revenue	172,150	185,309	550,848	580,320
ITPS | United States
Disaggregation of Revenues
Revenue	127,074	141,904	410,598	429,979
ITPS | EMEA
Disaggregation of Revenues
Revenue	40,035	39,053	125,107	136,722
ITPS | Other.
Disaggregation of Revenues
Revenue	5,041	4,352	15,143	13,619
HS
Disaggregation of Revenues
Revenue	62,090	60,955	188,740	173,940
HS | United States
Disaggregation of Revenues
Revenue	62,090	60,955	188,740	173,940
LLPS
Disaggregation of Revenues
Revenue	18,885	17,774	60,095	55,946
LLPS | United States
Disaggregation of Revenues
Revenue	$ 18,885	$ 17,774	$ 60,095	$ 55,946