Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Letters of Credit and Third-Party Guarantees As of September 30, 2024 and March 31, 2024, the Company was contingently liable under open standby letters of credit and bank guarantees issued by our banks in favor of third parties that totaled $4.5 million and $4.4 million, respectively. These letters of credit and bank guarantees primarily support insurance and bid and performance obligations. At September 30, 2024 and March 31, 2024, respectively, approximately $1.4 million and $1.3 million of these instruments reduced the available borrowings under the Revolving Credit Facility. The remainder is guaranteed under a separate $7.5 million facility of which $4.5 million and $4.4 million was available to the Company at September 30, 2024 and March 31, 2024, respectively. Government Contracting Matters - Provision for Claimed Costs For the three months ended September 30, 2024 and 2023, approximately 99% and 98%, respectively, of the Company's revenue was generated from contracts where the end user was an agency or department of the U.S. government, including contracts where the Company performed either as a prime contractor or subcontractor, and regardless of the geographic location in which the work was performed. For both the six months ended September 30, 2024 and 2023, approximately 98% of the Company's revenue was generated from such contracts. As noted in the Company's Annual Report on Form 10-K for the fiscal year ended March 31, 2024, in the ordinary course of business, agencies of the U.S. government, including the Defense Contract Audit Agency (“DCAA”), audit the Company’s claimed costs and conduct inquiries and investigations of our business practices with respect to government contracts to determine whether the Company's operations are conducted in accordance with these requirements and the terms of the relevant contracts. Based upon information obtained from DCAA’s audit findings over four historical rate years, the Company changed its estimate and reduced a portion of its provision for claimed costs during the second quarter of fiscal 2025, which resulted in a $121.7 million increase to revenue, to reflect our best estimate of the final cost rates for the outstanding audit years. Operating income for the three and six months ended September 30, 2024 was accordingly increased by $121.7 million and net income was increased by $90.1 million (or $0.70 of basic and $0.70 diluted earnings per common share for the three and six months ended September 30, 2024). Our final cost rates for the recently audited years remain subject to negotiation with the Defense Contract Management Agency (“DCMA”) Administrative Contracting Officer. Management believes it has recorded the appropriate provision for claimed costs for any audit, inquiry, or investigation of which it is aware that may be subject to any reductions and/or penalties. As of September 30, 2024 and March 31, 2024, the Company had recorded liabilities of approximately $245.9 million and $363.7 million, respectively, for estimated adjustments to claimed costs based on its historical DCAA audit results, including the final resolution of such audits with DCMA, for claimed costs incurred subsequent to fiscal 2011. Litigation Our performance under U.S. government contracts and compliance with the terms of those contracts and applicable laws and regulations are subject to continuous audit, review, and investigation by the U.S. government, which may include such investigative techniques as subpoenas or civil investigative demands. Given the nature of our business, these audits, reviews, and investigations may focus, among other areas, on various aspects of procurement integrity, labor time reporting, sensitive and/or classified information access and control, executive compensation, and post government employment restrictions. We are not always aware of our status in such matters, but we are currently aware of certain pending audits and investigations involving labor time reporting, procurement integrity, and classified information access. In addition, from time to time, we are also involved in legal proceedings and investigations arising in the ordinary course of business, including those relating to employment matters, relationships with clients and contractors, intellectual property disputes, and other business matters. These legal proceedings seek various remedies, including claims for monetary damages in varying amounts, none of which are considered material, or are unspecified as to amount. Although the outcome of any such matter is inherently uncertain and may be materially adverse, based on current information, we do not expect any of the currently ongoing audits, reviews, investigations, or litigation to have a material adverse effect on our financial condition and results of operations. As of both September 30, 2024 and March 31, 2024, there were no material amounts accrued in the condensed consolidated financial statements related to these proceedings as either the amounts are immaterial or the Company is not able to reasonably estimate the expected amount or range of cost or any loss associated with these matters. During the three months ended September 30, 2024, the Company secured insurance recoveries of $115.3 million from claims related to the Company’s settlement described in Note 20, “Commitments and Contingencies,” to the consolidated financial statements contained within our Annual Report on Form 10-K for the fiscal year ended March 31, 2024. The insurance recoveries offset our general and administrative expenses in our Condensed Consolidated Statement of Operations.