Intangibles (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Change in the Carrying Amount of Goodwill by Segment

The change in the carrying amount of goodwill by segment for the three months ended March 31, 2018 is as follows:

In thousands	Freight Segment		Transit Segment		Total
Balance at December 31, 2017	$	718,958	$	1,741,145	$	2,460,103
Additions	9,938		14,482		24,420
Foreign currency impact	1,402		42,894		44,296
Balance at March 31, 2018	$	730,298	$	1,798,521	$	2,528,819

Intangible Assets of the Company, Other Than Goodwill and Trade Names

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

In thousands	March 31, 2018		December 31, 2017
Patents, non-compete and other intangibles, net of accumulated
amortization of $43,122 and $43,021	$	17,651	$	17,554
Customer relationships, net of accumulated amortization
of $137,308 and $126,824	584,968		583,459
Total	$	602,619	$	601,013

Amortization Expense

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

Remainder of 2018	$	31,031
2019	39,094
2020	36,829
2021	36,059
2022	35,771