7. Goodwill and Other Intangible Assets

The Company reports all of its goodwill in its U.S. Debit and Credit segment at September 30, 2019 and December 31, 2018.

Intangible assets consist of customer relationships, technology and software, non-compete agreements and trademarks. Intangible amortization expense was $1,159 and $1,164 for the three months ended September 30, 2019 and 2018, respectively, and $3,487 and $3,492 for the nine months ended September 30, 2019 and 2018, respectively.

At September 30, 2019 and December 31, 2018, intangible assets, excluding goodwill, were comprised of the following:


				September 30, 2019						December 31, 2018
	Average Life					Accumulated		Net Book				Accumulated		Net Book
	(Years)			Cost		Amortization		Value		Cost		Amortization		Value

Customer relationships	12	to	20	$	55,454	$	(28,045)	$	27,409	$	55,454		(25,587)	$	29,867
Technology and software	7	to	10		7,101		(4,720)		2,381		7,101		(4,024)		3,077
Trademarks	7.5	to	10		3,330		(1,169)		2,161		3,330		(877)		2,453
Non-compete agreements	5	to	8		491		(491)		—		491		(451)		40
Intangible assets subject to amortization				$	66,376	$	(34,425)	$	31,951	$	66,376	$	(30,939)	$	35,437

The estimated future aggregate amortization expense for the identified amortizable intangibles noted above as of September 30, 2019 was as follows:


2019	$	1,150
2020		4,595
2021		4,352
2022		3,867
2023		3,867
Thereafter		14,120
	$	31,951