GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill by reportable segment was as follows:



	North America			Europe			Total
Balance as of January 1, 2016	$	81,464		$	34,466		$	115,930
NavigationArts purchase accounting adjustments	2,030			—			2,030
AGS purchase accounting adjustments	(9,361		)	—			(9,361		)
Other acquisitions	2,404			177			2,581
Other acquisitions purchase accounting adjustments	395			87			482
Effect of currency translation	(120		)	(2,253		)	(2,373		)
Balance as of December 31, 2016	76,812			32,477			109,289
Other acquisitions	199			4,533			4,732
Other acquisitions purchase accounting adjustments	(285		)	2,100			1,815
Effect of currency translation	564			3,131			3,695
Balance as of December 31, 2017	$	77,290		$	42,241		$	119,531

Components of Intangible Assets

Intangible assets other than goodwill as of December 31, 2017 and 2016 were as follows:



	As of December 31, 2017
	Weighted average life at acquisition (in years)	Gross carrying amount		Accumulated amortization			Net carrying amount
Customer relationships	10	$	66,646	$	(22,200	)	$	44,446
Trade names	5	4,099		(4,034		)	65
Total		$	70,745	$	(26,234	)	$	44,511



	As of December 31, 2016
	Weighted average life at acquisition (in years)	Gross carrying amount		Accumulated amortization			Net carrying amount
Customer relationships	10	$	65,409	$	(15,133	)	$	50,276
Trade names	5	5,622		(4,661		)	961
Non-competition agreements	4	756		(733		)	23
Total		$	71,787	$	(20,527	)	$	51,260

Intangible Assets Amortization Expense Recognized

Recognized amortization expense for each of the years ended December 31 is presented in the table below:



	For the Years Ended December 31,
	2017		2016		2015
Customer relationships	$	6,643	$	6,858	$	3,961
Trade names	896		1,139		1,280
Non-competition agreements	23		173		175
Total	$	7,562	$	8,170	$	5,416

Estimated Amortization Expense

Estimated amortization expense related to the Company’s existing intangible assets for the next five years ending December 31 and thereafter is as follows:



	Amount
2018	$	6,661
2019	6,661
2020	6,661
2021	6,661
2022	6,508
Thereafter	11,359
Total	$	44,511