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v3.23.1

Income Taxes - Components of Net Deferred Income Taxes (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Mar. 31, 2022
--- | --- | ---
Deferred income tax assets: |  |
Accrued expenses | $ 146,945 | $ 80,344
Deferred compensation | 47,931 | 56,361
Stock-based compensation | 11,628 | 9,783
Pension and postretirement benefits | 28,585 | 30,797
Net operating loss and other carryforwards | 16,984 | 44,118
Research and development expenditures and indirect effects | 599,381 | 0
State tax credits | 11,516 | 24,268
Operating lease liabilities | 69,604 | 82,799
Other | 9,100 | 2,501
Total gross deferred income tax assets | 941,674 | 330,971
Less: Valuation allowance | (11,788) | (8,715)
Total net deferred income tax assets | 929,886 | 322,256
Deferred income tax liabilities: |  |
Unbilled receivables | (177,321) | (209,753)
Intangible assets | (88,858) | (56,657)
Property and equipment | (34,905) | (198,940)
Operating lease right-of-use assets | (48,939) | (59,401)
Other | (6,083) | (4,780)
Total deferred income tax liabilities | (356,106) | (529,531)
Net deferred income tax asset | $ 573,780 |
Net deferred income tax (liability) |  | $ (207,275)

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