INCOME TAX

3 Months Ended

Mar. 31, 2022

INCOME TAX [Abstract]

INCOME TAX

3.  INCOME TAX

Our effective tax rate for the three months ended March 31, 2022 and 2021 was 23.4% and 23.0%, respectively. Our effective tax rate differs from the federal statutory rate primarily due to U.S. state income tax expense, the difference in tax rates for expenses that are nondeductible for tax purposes, the change in our valuation allowance associated with our deferred tax assets, and differences in tax rates.