Intangibles, Net (Tables)

12 Months Ended

Dec. 31, 2018

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Schedule of intangibles

Intangibles, net, consisted of the following:

	December 31, 2018
(in thousands)	Amortization Method	Cost		Accumulated Amortization			Net
Trademarks	Straight-Line	$	13,540	$	(9,856	)	$	3,684
Customer relationships	Accelerated	98,912		(93,463		)	5,449
Patents	Straight-Line	6,570		(6,570		)	—
Total		$	119,022	$	(109,889	)	$	9,133

	December 31, 2017
(in thousands)	Amortization Method	Cost		Accumulated Amortization			Net
Trademarks	Straight-Line	$	13,540	$	(9,304	)	$	4,236
Customer relationships	Accelerated	99,133		(92,072		)	7,061
Patents	Straight-Line	42,780		(42,279		)	501
Total		$	155,453	$	(143,655	)	$	11,798

Schedule of expected future amortization expense

The below table summarizes the estimated aggregate amortization expense expected to be recognized on the above intangible assets:

(in thousands)	Amount
2019	$	1,803
2020	1,568
2021	1,309
2022	1,173
2023	579
2024 and thereafter	2,701
Total	$	9,133