Intangibles

6 Months Ended

Jun. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

INTANGIBLES

The change in the carrying amount of goodwill by segment for the six months ended June 30, 2019 is as follows:



In thousands	Freight Segment			Transit Segment			Total
Balance at December 31, 2018	$	713,391		$	1,683,153		$	2,396,544
Additions	5,754,115			15,420			5,769,535
Foreign currency impact	(11,687		)	(3,721		)	(15,408		)
Balance at June 30, 2019	$	6,455,819		$	1,694,852		$	8,150,671

As of June 30, 2019 and December 31, 2018, the Company’s trade names had a net carrying amount of $626.6 million and $582.8 million, respectively. The Company believes these intangibles have indefinite lives, with the exception of the GE Transportation trade name, to which the company has assigned a useful life of 5 years.

Intangible assets of the Company, other than goodwill and trade names, consist of the following:



In thousands	June 30, 2019		December 31, 2018
Backlog, intellectual property, patents, and other intangibles, net of accumulated
amortization of $76,059 and $42,446	$	2,689,022	$	15,328
Customer relationships, net of accumulated amortization
of $183,933 and $158,533	1,048,774		531,761
Total	$	3,737,796	$	547,089

The weighted average remaining useful life of backlog, intellectual property, customer relationships and other intangibles were 18 years, 10 years, 18 years and 13 years, respectively. Amortization expense for intangible assets was $66.0 million and $93.4 million for the three and six months ended June 30, 2019, and $9.9 million and $20.3 million for the three and six months ended June 30, 2018, respectively.

Amortization expense for the five succeeding years is estimated to be as follows:



Remainder of 2019	$	130,967
2020	259,206
2021	259,117
2022	258,805
2023	258,174