7.	INTANGIBLES

Goodwill and other intangible assets with indefinite lives are not amortized. Other intangibles (with definite lives) are amortized on a straight-line basis over their estimated economic lives. Goodwill and indefinite lived intangible assets are reviewed annually during the fourth quarter for impairment (See Note 2 “Summary of Significant Accounting Policies” included herein). Goodwill and indefinite live intangible assets were not impaired at December 31, 2012 and 2011.

Goodwill was $666.0 million and $587.5 million at December 31, 2012 and 2011, respectively. The change in the carrying amount of goodwill by segment for the year ended December 31, 2012 is as follows:


*In thousands*	Freight Segment		Transit Segment		Total
Balance at December 31, 2011	$	388,221	$	199,310	$	587,531
Adjustment to preliminary purchase price allocation of acquisitions		2,660		1,364		4,024
Acquisition		4,781		63,505		68,286
Foreign currency impact		1,522		4,659		6,181

Balance at December 31, 2012	$	397,184	$	268,838	$	666,022

As of December 31, 2012 and 2011, the Company’s trademarks had a net carrying amount of $131.3 million and $114.6 million, respectively, and the Company believes these intangibles have an indefinite life. Intangible assets of the Company, other than goodwill and trademarks, consist of the following:


	December 31,
*In thousands*	2012		2011
Patents, non-compete, and other intangibles, net of accumulated amortization of $35,556 and $32,316	$	11,835	$	14,849
Customer relationships, net of accumulated amortization of $31,572 and $21,295		165,160		127,960

Total	$	176,995	$	142,809

The weighted average useful lives of patents, customer relationships and intellectual property were five years, 16 years and 17 years respectively. Amortization expense for intangible assets was $15.3 million, $15.0 million, and $10.2 million for the years ended December 31, 2012, 2011, and 2010, respectively.

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


2013	$	14,368
2014	$	13,693
2015	$	12,558
2016	$	12,405
2017	$	10,884