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INCOME TAXES (Tables)
12 Months Ended
Mar. 31, 2022
Income Tax Disclosure [Abstract]  
Summary of Components of Income Tax Expense
The components of income tax expense were as follows: 
 Fiscal Year Ended March 31,
 202220212020
Current
U.S. Federal$232,844 $(227,309)$(2,638)
State and local26,333 39,542 18,410 
Foreign8,486 9,250 15,625 
Total current267,663 (178,517)31,397 
Deferred
U.S. Federal(146,581)245,624 59,856 
State and local11,781 (13,626)5,578 
Foreign4,603 — — 
Total deferred(130,197)231,998 65,434 
Total$137,466 $53,481 $96,831 
Schedule of Effective Income Tax Rate Reconciliation
A reconciliation of the provision for income tax to the amount computed by applying the statutory federal income tax rate to income from continuing operations before income taxes for each of the three years ended March 31 is as follows: 
 Fiscal Year Ended March 31,
 202220212020
Income tax expense computed at U.S. federal statutory rate$126,981 $139,112 $121,681 
Increases (reductions) resulting from:
State and local income taxes, net of federal tax28,762 17,586 20,031 
Foreign income taxes, net of federal tax9,243 6,679 12,344 
Meals and entertainment343 653 1,761 
Re-measurement of current year losses under CARES Act
— (76,767)— 
Excess tax benefits from stock-based compensation(4,227)(8,556)(10,265)
Research and development and other federal credits(34,080)(30,313)(90,898)
Executive compensation -162(m)3,614 3,813 2,346 
Foreign-Derived Intangible Income (FDII)(9,115)(4,536)(4,915)
Changes in uncertain tax positions16,938 6,793 44,621 
Other(993)(983)125 
Income tax expense from operations$137,466 $53,481 $96,831 
Schedule of Components of Income Tax Receivables and Payables
The Company has both income tax receivables and income tax payable on its consolidated balance sheet as follows:
 March 31,
 20222021
Current income tax receivable
$47,142 $175,541 
Long term income tax receivable
$341,738 $333,188 
Current income tax payable
$34,324 $30,694 
Schedule of Components of Deferred Tax Assets and Liabilities
The significant components of the Company’s deferred income tax assets and liabilities were as follows:
 March 31,
 20222021
Deferred income tax assets:
Accrued expenses$80,344 $78,005 
Deferred compensation56,361 52,191 
Stock-based compensation9,783 5,724 
Pension and postretirement benefits30,797 32,881 
Net operating loss carryforwards44,118 98,471 
Extended disability benefits2,426 2,838 
Interest rate swaps75 9,955 
Federal tax credits— 12,582 
State tax credits24,268 27,243 
Operating lease liabilities82,799 86,046 
Other— 3,378 
Total gross deferred income tax assets330,971 409,314 
Less: Valuation allowance(8,715)(6,165)
Total net deferred income tax assets322,256 403,149 
Deferred income tax liabilities:
Unbilled receivables(209,753)(245,809)
Intangible assets(56,657)(69,519)
Debt issuance costs(1,435)(1,488)
Property and equipment(198,940)(336,321)
Operating lease right-of-use assets(59,401)(62,442)
Internally developed software— (20,309)
Other(3,345)— 
Total deferred income tax liabilities(529,531)(735,888)
Net deferred income tax liability$(207,275)$(332,739)
Schedule of Unrecognized Tax Benefits
A reconciliation of the beginning and ending amount of potential tax benefits for the periods presented is as follows: 
 March 31,
 202220212020
Beginning of year$62,742 $55,221 $11,083 
Increases in prior year position2,620 5,018 34,001 
Increases in current year position13,530 12,753 10,970 
Decreases in prior year position(373)— (765)
Settlements with taxing authorities— — — 
Lapse of statute of limitations— (10,250)(68)
End of year$78,519 $62,742 $55,221