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Income Taxes
9 Months Ended
Dec. 31, 2020
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
Effective Income Tax Rate

Income tax expense and the effective income tax rate were as follows:
Three Months Ended December 31,Nine Months Ended December 31,
2020201920202019
Income tax expense$73,020 $55,010 $99,331 $64,169 
Effective income tax rate22.2 %21.4 %22.1 %19.8 %

The tax provisions during the nine months ended December 31, 2020 and 2019 were computed using the estimated effective income tax rates applicable to each of the domestic and foreign taxable jurisdictions for the full fiscal year and were adjusted for discrete items that occurred within the periods presented.

During the three months ended December 31, 2020, the slight increase in the effective income tax rate, compared to the prior period, was due to changes in the jurisdictional mix of worldwide income before income taxes forecasted for the fiscal year ending March 31, 2021, partially offset by lower net discrete tax expenses, primarily driven by reduced unrecognized tax benefits recorded in the current period. During the nine months ended December 31, 2020, the increase in the effective income tax rate, compared to the prior period, was due to changes in the jurisdictional mix of worldwide income before income taxes forecasted for the fiscal year ending March 31, 2021 as well as a reduced tax benefit during the nine months ended December 31, 2020, compared to the prior period, which recognized a tax benefit for the favorable settlement of a state income tax audit. The increase from prior year was partially offset by reduced discrete tax expense for unrecognized tax benefits recorded in the current period, compared to the prior period.

Unrecognized Tax Benefits
During the nine months ended December 31, 2020, the amount of gross unrecognized tax benefits increased by $1,801 to $19,439. This change is primarily related to a net increase in prior year tax position reserves recorded in income tax liability in the condensed consolidated balance sheets.