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Intangible Assets (Tables)
 9 Months Ended
Sep. 29, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Acquired Intangible Assets
The following table summarizes acquired intangible assets as follows: 
September 29, 2018December 31, 2017
(In thousands)
Weighted
Average Life
Gross Carrying
Amount
Accumulated
Amortization
Gross Carrying
Amount
Accumulated
Amortization
Patents
11 years$2,146 $1,694 $2,146 $1,629 
Non-compete Agreement
4 years10,900 3,932 10,900 1,687 
Trade Names
10 years11,465 4,915 11,492 4,114 
Completed and Unpatented Technology
10 years38,069 14,951 38,114 11,931 
Backlog
2 years14,424 14,424 14,424 12,184 
Customer Relationships
15 years137,984 36,725 137,967 30,005 
Total Intangible Assets
12 years$214,988 $76,641 $215,043 $61,550 
Summary of Amortization Expense for Acquired Intangibles
All acquired intangible assets other than goodwill and one trade name are being amortized. Amortization expense for acquired intangibles is summarized as follows: 
Nine Months Ended Three Months Ended 
(In thousands)
September 29, 2018September 30, 2017September 29, 2018September 30, 2017
Amortization Expense
$15,144 $8,269 $4,276 $2,929 
Summary of Amortization Expense for Intangible Assets for Each of Next Five Years
Amortization expense for acquired intangible assets expected for 2018 and for each of the next five years is summarized as follows:
(In thousands)
2018 $19,403 
2019 16,707 
2020 15,981 
2021 14,072 
2022 13,637 
2023 12,470