Intangibles (Q3) (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2018

Dec. 31, 2017

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 nine months ended September 30, 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		5,252			13,707			18,959
Foreign currency impact		(7,710	)		(58,798	)		(66,508	)
Balance at September 30, 2018	$	716,500		$	1,696,054		$	2,412,554

The change in the carrying amount of goodwill by segment for the year ended December 31, 2017 is as follows:


In thousands	Freight Segment		Transit Segment		Total
Balance at December 31, 2016	$	550,902	$	1,527,863	$	2,078,765
Additions		152,096		34,391		186,487
Foreign currency impact		15,960		178,891		194,851
Balance at December 31, 2017	$	718,958	$	1,741,145	$	2,460,103

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	September 30, 2018		December 31, 2017
Patents, non-compete and other intangibles, net of accumulated
amortization of $42,928 and $43,021	$	15,192	$	17,554
Customer relationships, net of accumulated amortization
of $151,007 and $126,824		542,780		583,459
Total	$	557,972	$	601,013

As of December 31, 2017 and 2016, the Company’s trade names had a net carrying amount of $603.4 million and $510.5 million, respectively, and the Company believes these intangibles have indefinite lives. Intangible assets of the Company, other than goodwill and trade names, consist of the following:

	December 31,
In thousands	2017		2016
Patents, non-compete and other intangibles, net of accumulated amortization of $43,021 and $40,638	$	17,554	$	15,360
Customer relationships, net of accumulated amortization of $126,824 and $87,334		583,459		528,068
Total	$	601,013	$	543,428

Amortization Expense

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



Remainder of 2018	$	10,460
2019		38,335
2020		36,099
2021		35,608
2022		35,320

Estimated amortization expense for the five succeeding years is as follows (in thousands):

2018	$	38,059
2019		36,076
2020		34,050
2021		33,777
2022		33,489