v3.25.2
Revenue Recognition (Tables)
 6 Months Ended
Jun. 30, 2025
Revenue from Contract with Customer [Abstract]  
Schedule of Disaggregated Revenues
Revenues by geographic area and customer type were as follows:
 Three Months Ended June 30, 2025Three Months Ended June 30, 2024
Government OperationsCommercial OperationsTotalGovernment OperationsCommercial OperationsTotal
 (In thousands)
United States:
Government$513,749 $— $513,749 $511,498 $— $511,498 
Non-Government69,873 24,852 94,725 22,217 16,063 38,280 
$583,622 $24,852 $608,474 $533,715 $16,063 $549,778 
Canada:
Government$10 $— $10 $23 $— $23 
Non-Government65 141,161 141,226 151 120,516 120,667 
$75 $141,161 $141,236 $174 $120,516 $120,690 
Other:
Government$3,725 $— $3,725 $637 $— $637 
Non-Government1,537 10,126 11,663 6,320 4,912 11,232 
$5,262 $10,126 $15,388 $6,957 $4,912 $11,869 
Segment Revenues$588,959 $176,139 765,098 $540,846 $141,491 682,337 
Eliminations(1,059)(872)
Revenues$764,039 $681,465 
 Six Months Ended June 30, 2025Six Months Ended June 30, 2024
Government OperationsCommercial OperationsTotalGovernment OperationsCommercial OperationsTotal
 (In thousands)
United States:
Government$1,039,044 $— $1,039,044 $973,730 $— $973,730 
Non-Government94,146 40,914 135,060 43,827 32,858 76,685 
$1,133,190 $40,914 $1,174,104 $1,017,557 $32,858 $1,050,415 
Canada:
Government$112 $— $112 $25 $— $25 
Non-Government122 242,778 242,900 168 215,528 215,696 
$234 $242,778 $243,012 $193 $215,528 $215,721 
Other:
Government$7,596 $— $7,596 $1,663 $— $1,663 
Non-Government3,226 20,757 23,983 8,554 10,143 18,697 
$10,822 $20,757 $31,579 $10,217 $10,143 $20,360 
Segment Revenues$1,144,246 $304,449 1,448,695 $1,027,967 $258,529 1,286,496 
Eliminations(2,398)(1,065)
Revenues$1,446,297 $1,285,431 
Revenues by timing of transfer of goods or services were as follows:
 Three Months Ended June 30, 2025Three Months Ended June 30, 2024
Government OperationsCommercial OperationsTotalGovernment OperationsCommercial OperationsTotal
 (In thousands)
Over time$586,443 $153,085 $739,528 $537,906 $112,125 $650,031 
Point-in-time2,516 23,054 25,570 2,940 29,366 32,306 
Segment Revenues$588,959 $176,139 765,098 $540,846 $141,491 682,337 
Eliminations(1,059)(872)
Revenues$764,039 $681,465 
 Six Months Ended June 30, 2025Six Months Ended June 30, 2024
Government OperationsCommercial OperationsTotalGovernment OperationsCommercial OperationsTotal
 (In thousands)
Over time$1,136,989 $256,306 $1,393,295 $1,022,194 $208,980 $1,231,174 
Point-in-time7,257 48,143 55,400 5,773 49,549 55,322 
Segment Revenues$1,144,246 $304,449 1,448,695 $1,027,967 $258,529 1,286,496 
Eliminations(2,398)(1,065)
Revenues$1,446,297 $1,285,431 
Revenues by contract type were as follows:
 Three Months Ended June 30, 2025Three Months Ended June 30, 2024
Government OperationsCommercial OperationsTotalGovernment OperationsCommercial OperationsTotal
 (In thousands)
Fixed-Price Incentive Fee$220,653 $3,517 $224,170 $357,737 $5,420 $363,157 
Firm-Fixed-Price259,153 118,365 377,518 81,026 68,507 149,533 
Cost-Plus Fee109,107 — 109,107 102,083 — 102,083 
Time-and-Materials46 54,257 54,303 — 67,564 67,564 
Segment Revenues$588,959 $176,139 765,098 $540,846 $141,491 682,337 
Eliminations(1,059)(872)
Revenues$764,039 $681,465 
 Six Months Ended June 30, 2025Six Months Ended June 30, 2024
Government OperationsCommercial OperationsTotalGovernment OperationsCommercial OperationsTotal
 (In thousands)
Fixed-Price Incentive Fee$429,205 $7,844 $437,049 $654,988 $10,942 $665,930 
Firm-Fixed-Price515,015 210,305 725,320 175,946 135,712 311,658 
Cost-Plus Fee199,896 — 199,896 195,798 — 195,798 
Time-and-Materials130 86,300 86,430 1,235 111,875 113,110 
Segment Revenues$1,144,246 $304,449 1,448,695 $1,027,967 $258,529 1,286,496 
Eliminations(2,398)(1,065)
Revenues$1,446,297 $1,285,431 
Revenue, Performance Obligation, Impact of Changes in Estimates The aggregate impact of changes in estimates decreased our revenues and operating income as follows:
Three Months Ended
June 30,		Six Months Ended
June 30,
 2025202420252024
 (In thousands)(In thousands)
Revenues (1)
$17,520 $(2,098)$5,930 $(2,791)
Operating Income (1)
$17,605 $(2,079)$6,046 $(3,350)
(1)During the three months ended June 30, 2025, our Government Operations segment results were favorably impacted by contract adjustments related to a nuclear operations contract. These adjustments resulted in an increase in revenue and operating income of $29.4 million for the three and six months ended June 30, 2025. During the three and six months ended June 30, 2024, no adjustments to any one contract had a material impact on our consolidated financial statements.
Schedule of Contract Assets and Liabilities
 June 30,December 31,
 20252024
 (In thousands)
Included in Contracts in progress:
Unbilled receivables$620,627 $559,415 
Retainages$40,712 $33,667 
Advance billings on contracts$198,336 $161,290