Income Tax Expense (Tables)
 12 Months Ended
Mar. 31, 2020
Income Tax Expense [Abstract]  
Schedule of Deferred Tax Assets and Liabilities The significant components of the deferred tax assets and liabilities recorded in our accompanying balance sheets at March 31, 2020 and 2019 were as follows:
March 31,
 
2020
 
2019
Deferred Tax Assets:
 
 
 
 
Post-retirement benefit accrual
 
$
2,871

 
$
3,142

Compensation
 
12,560

 
14,275

Net operating loss carryforwards
 
16,149

 
19,195

Accrued expenses
 
5,490

 
4,858

Insurance
 
3,620

 
3,187

Deferred income
 
11,316

 
7,509

Bad debt
 
1,820

 
1,386

Pension
 
2,273

 
3,364

Operating leases (1)
 
28,945

 
—

Other
 
6,024

 
7,707

Deferred Tax Assets
 
91,068

 
64,623

Less: Valuation allowance
 
13,891

 
13,478

Total Deferred Tax Assets
 
77,177

 
51,145

Deferred Tax Liabilities:
 
 
 
 
Depreciation and depletion
 
68,179

 
61,060

Operating leases (1)
 
29,268

 
—

Intangibles
 
129,951

 
128,479

Other
 
2,078

 
2,197

Total Deferred Tax Liabilities
 
229,476

 
191,736

Net Deferred Tax Assets (Liabilities)
 
$
(152,299
)
 
$
(140,591
)
Schedule of Income before Income Tax, Domestic and Foreign Income from continuing operations before income taxes was as follows:
Years Ended March 31,
 
2020
 
2019
 
2018
United States operations
 
$
325,522

 
$
235,405

 
$
203,872

Ireland operations
 
29,543

 
13,693

 
11,837

Other locations operations
 
143,616

 
120,372

 
139,273

 
 
$
498,681

 
$
369,470


$
354,982
Schedule of Components of Income Tax Expense (Benefit) The components of the provision for income taxes related to income from continuing operations consisted of the following:
Years Ended March 31,
 
2020
 
2019
 
2018
Current:
 
 
 
 
 
 
United States federal
 
$
42,032

 
$
29,943

 
$
47,728

United States state and local
 
9,971

 
12,484

 
7,727

Ireland
 
5,036

 
2,627

 
2,596

Other locations
 
24,600

 
26,824

 
26,742

 
 
81,639

 
71,878

 
84,793

Deferred:
 
 
 
 
 
 
United States federal
 
10,073

 
5,775

 
(15,728
)
United States state and local
 
2,363

 
2,836

 
2,656

Ireland
 
(899
)
 
(546
)
 
(280
)
Other locations
 
(2,300
)
 
(15,549
)
 
(8,081
)
 
 
9,237

 
(7,484
)
 
(21,433
)
Total Provision for Income Taxes
 
$
90,876

 
$
64,394

 
$
63,360
provision for taxes rate reconciliation
The total provision for income taxes can be reconciled to the tax computed at the Ireland statutory tax rate for 2020 and 2019, and the United Kingdom statutory rate for 2018 as follows:
Years Ended March 31,
 
2020
 
2019
 
2018
National statutory tax rate
 
12.5
 %
 
12.5
 %
 
19.0
 %
Increase (decrease) in accruals for uncertain tax positions
 
(0.3
)%
 
—
 %
 
0.1
 %
U.S. state and local taxes, net of federal income tax benefit
 
2.0
 %
 
3.1
 %
 
2.3
 %
Increase in valuation allowances
 
0.5
 %
 
0.4
 %
 
0.1
 %
U.S. research and development credit
 
(0.5
)%
 
(0.6
)%
 
(0.5
)%
U.S. foreign income tax credit
 
(0.6
)%
 
(0.2
)%
 
(0.2
)%
Difference in non-Ireland tax rates
 
6.9
 %
 
4.5
 %
 
—
 %
Difference in non-United Kingdom tax rates
 
—
 %
 
—
 %
 
4.1
 %
U.S. manufacturing deduction
 
—
 %
 
—
 %
 
(0.8
)%
Excess tax benefit for equity compensation
 
(2.8
)%
 
(2.2
)%
 
(1.8
)%
Tax rate changes on deferred tax assets and liabilities
 
0.1
 %
 
(0.6
)%
 
(10.3
)%
 U.S. transition tax on foreign earnings
 
—
 %
 
(0.3
)%
 
4.9
 %
 U.S. tax reform impact, GILTI and FDII
 
0.1
 %
 
0.3
 %
 
—
 %
Acquisitions and divestitures
 
—
 %
 
—
 %
 
0.5
 %
Capitalized acquisition, redomiciliation costs
 
0.1
 %
 
0.5
 %
 
—
 %
All other, net
 
0.2
 %
 
—
 %
 
0.4
 %
Total Provision for Income Taxes
 
18.2
 %
 
17.4
 %
 
17.8
 %
Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible
A reconciliation of the beginning and ending balances of the total amounts of unrecognized tax benefits is as follows:
 
 
2020
 
2019
Unrecognized Tax Benefits Balance at April 1
 
$
2,314

 
$
2,500

Increases for tax provisions of current year
 
176

 
178

Decreases for tax provisions of prior year
 
(1,570
)
 
(186
)
Other, including currency translation
 
(45
)
 
(178
)
Unrecognized Tax Benefits Balance at March 31
 
$
875

 
$
2,314