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Income Taxes (Tables)
9 Months Ended
Sep. 30, 2020
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit)
The provision (benefit) for income taxes consists of the following:
 Three Months EndedNine Months Ended
 September 30,
2020
September 30,
2019
September 30,
2020
September 30,
2019
 (in thousands)
Current$3,081 $446 $8,435 $3,766 
Deferred2,615 296 7,676 3,614 
     Income tax provision$5,696 $742 $16,111 $7,380 
Schedule of Effective Income Tax Rate Reconciliation
The reconciliation of the Federal statutory income tax rate to the effective income tax rate is as follows:

 Three Months EndedNine Months Ended
 September 30,
2020
September 30,
2019
September 30,
2020
September 30,
2019
Federal statutory rate21.0 %21.0 %21.0 %21.0 %
State income taxes, net of Federal benefit2.3 1.3 4.0 4.2 
Amended Oklahoma tax returns— (4.5)— (2.0)
Excess tax benefits(2.3)(1.7)(3.3)(3.1)
Return to provision adjustments0.5 (7.1)0.2 (2.1)
Other0.3 (4.1)(0.8)(1.2)
     Effective tax rate21.8 %4.9 %21.1 %16.8 %