Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred Tax Assets:
Accruals and allowances	$ 25,737	$ 25,041
Net operating loss carryforwards	1,010	1,352
Stock-based compensation	4,032	5,374
Operating lease liability	4,060	5,303
Deferred revenue	1,212	641
Acquired intangibles	29,857	33,860
Depreciation and amortization	1,661	1,651
Other	3,971	3,285
Total deferred tax assets	71,540	76,507
Deferred Tax Liabilities:
Right of use asset	(3,130)	(4,264)
Other	(1,083)	(987)
Total deferred tax liabilities	(4,213)	(5,251)
Valuation Allowance	(3,532)	(2,933)
Net deferred tax assets	63,795	68,323
Valuation allowance, net of federal tax	$ 3,500	$ 2,900