Acquired Intangible Assets

6 Months Ended

Jun. 30, 2018

Acquired Intangible Assets [Abstract]

Note 8.

Acquired Intangible Assets

Acquired identifiable intangible assets consist of the following:

	June 30, 2018			December 31, 2017
	(In thousands)

Customer relationships	$	87,226		$	87,290
Trademarks and trade names		6,800			6,800
Non-compete agreements		3,192			3,193
Patents		723			723
Supply agreements		800			800
Leaseholds		160			160
Total acquired intangible assets		98,901			98,966
Less accumulated amortization (1)		(47,668	)		(43,853	)
Net acquired intangible assets	$	51,233		$	55,113

(1)

Applies to all intangible assets, except for trademarks and trade names totaling $5.2 million, which have indefinite useful lives and, as such, are not being amortized.

Total amortization expense for acquired intangible assets was $1.9 million and $3.8 million for the three months and six months ended June 30, 2018, respectively, and $2.1 million and $4.2 million for the comparable periods in 2017. Based on the current estimated useful lives assigned to our acquired intangible assets, amortization expense is estimated to be $3.7 million for the remainder of 2018, $6.3 million in 2019, $5.9 million in 2020, $4.6 million in 2021 and $25.5 million in the aggregate for the years 2022 through 2031.