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INCOME TAXES
3 Months Ended
Mar. 31, 2022
INCOME TAXES  
INCOME TAXES

9.    INCOME TAXES

Three Months Ended

March 31, 

March 31, 

2022

    

2021

Income tax expense

$

15,304

$

17,679

Effective tax rate

18.8%

24.6%

The effective tax rate for the three months ended March 31, 2021, included an income tax expense attributable to an increase in valuation allowance on certain deferred tax assets.