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Income Taxes (Tables)
3 Months Ended
Mar. 31, 2022
Income Tax Disclosure [Abstract]  
Schedule Of Interest And Penalties
March 31, 2022December 31, 2021
Gross liability for unrecognized tax benefits, exclusive of interest and penalties$15,768 $14,887 
Interest and penalties on unrecognized benefits1,445 1,338 
Total gross uncertain tax positions$17,213 $16,225 
Amount included in Current liabilities$4,272 $4,253 
Amount included in Other long-term liabilities12,941 11,972 
$17,213 $16,225 
Schedule of Effective Income Tax Rate Reconciliation
The effective income tax rate for the three months ended March 31, 2022 and 2021 differs from the federal income tax statutory rate due to the following:
Three Months Ended March 31,
20222021
Statutory rate21.0 %21.0 %
State taxes, net of federal tax benefit2.9 3.1 
Foreign tax expense and tax rate differential(0.1)(0.1)
Tax benefit from stock option exercises(0.4)(1.1)
Other, net(0.3)(0.3)
23.1 %22.6 %