Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Finite-lived Intangible Assets Amortization Expense

We recorded amortization expense related to intangible assets on the Consolidated Statements of Operations as presented in the following table:

	Three Months Ended				Six Months Ended
(In thousands)	June 30, 2018		July 1, 2017		June 30, 2018		July 1, 2017
Research and development	$	123	$	141	$	250	$	314
Amortization of acquired intangible assets	4,523		8,737		10,159		17,251
	$	4,646	$	8,878	$	10,409	$	17,565