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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

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