Goodwill and Intangible Assets (Tables)
 6 Months Ended
Jul. 02, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
The changes in the carrying amount of goodwill for the six months ended July 2, 2021 are as follows:
(In thousands)
Balance at December 31, 2020$339,702 
Adjustments to preliminary purchase price allocation of Zenetex(17,510)
Adjustments to preliminary purchase price allocation of HHB(4,584)
Balance at July 2, 2021$317,608 
Schedule of Identifiable Intangible Assets
Identifiable intangible assets consist of the following:
July 2, 2021December 31, 2020
(In thousands)Gross Carrying AmountAccumulated AmortizationNet Carrying AmountGross Carrying AmountAccumulated AmortizationNet Carrying Amount
Contract backlogs and recompetes$74,400 $(10,693)$63,707 $48,800 $(6,645)$42,155 
Customer contracts7,200 (2,852)4,348 7,200 (2,133)5,067 
Trade names and other1,248 (485)763 1,243 (360)883 
Balance$82,848 $(14,030)$68,818 $57,243 $(9,138)$48,105 
Schedule of Amortization Expense
Future estimated amortization expense is as follows (in thousands):
PeriodAmortization
2021 (excluding the six months ended July 2, 2021) $4,891 
2022$8,253 
2023$8,157 
2024$7,050 
2025$6,253 
After 2025$34,214