INTANGIBLE ASSETS

The components of intangible assets consisted of the following (amounts in thousands):



	Weighted Average Useful Lives (in Years)	June 30, 2016			December 31, 2015
Amortizable intangible assets:
Customer relationships	11.2	$	13,671		$	13,413
Patents, trademarks and other	8.3	14,278			13,237
Total at cost		27,949			26,650
Less accumulated amortization		(10,377		)	(8,852		)
		$	17,572		$	17,798

Amortization related to intangible assets for the six months ended June 30, 2016 and 2015, totaled $1.1 million and $1.8 million, respectively. Intangible assets are included as a component of other assets in the Consolidated Condensed Balance Sheet.

The estimated aggregate amortization expense at June 30, 2016, is as follows (amounts in thousands):



July 1 - December 31, 2016	$	1,228
2017	2,153
2018	2,153
2019	2,153
2020	2,153
Thereafter	7,732
	$	17,572