Segment Information (Schedule of Reportable Segments and Reconciliation of Segment Contribution Income to Income Before Income Taxes) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total net revenue		$ 1,168,073	$ 1,255,202	$ 998,763
Total segment contribution income		179,025	194,686	135,057
Corporate and unallocated costs		(83,883)	(83,867)	(70,525)
Amortization of intangibles	[1]	(1,897)	(5,952)	(6,731)
Stock-based compensation expense		(25,995)	(30,505)	(29,137)
Separation expense		0	0	(264)
Change in fair value of contingent consideration		3,003	2,928	25
Restructuring and other charges		(3,341)	(1,702)	(2,077)
Litigation reserves, net		(315)	(44)	(160)
Other income (expenses), net	[2]	(1,093)	(4,741)	3,383
Income before income taxes		65,504	70,803	29,571
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Segment Reporting Information [Line Items]
Total net revenue		853,472	1,007,545	711,391
Total segment contribution income		$ 116,889	$ 152,512	$ 67,775
Segment contribution margin		13.70%	15.10%	9.50%
SMB
Segment Reporting Information [Line Items]
Total net revenue		$ 314,601	$ 247,657	$ 287,372
Total segment contribution income		$ 62,136	$ 42,174	$ 67,282
Segment contribution margin		19.80%	17.00%	23.40%

[1] Amounts excluded amortization expense related to patents within purchased intangibles in cost of revenue.

[2] Amounts included gain/loss on investments, net, of $(1.4) million, $(6.2) million and $(0.2) million for the years ended December 31, 2021, 2020 and 2019, respectively.