GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2016

The balances and changes in the carrying amount of Goodwill by segment are as follows (in thousands of dollars):



	United States		Canada			Other Businesses			Total
Balance at January 1, 2015	$	202,020	$	141,189		$	163,696		$	506,905
Acquisitions	—		—			114,903			114,903
Translation	—		(22,660		)	(16,812		)	(39,472		)
Balance at December 31, 2015	202,020		118,529			261,787			582,336
Acquisitions and Purchase Price Adjustments	—		—			8,362			8,362
Impairment	—		—			(47,244		)	(47,244		)
Translation	—		3,611			(19,915		)	(16,304		)
Balance at December 31, 2016	$	202,020	$	122,140		$	202,990		$	527,150



Cumulative goodwill impairment charges, January 1, 2016	$	17,038	$	32,265	$	23,055	$	72,358
Goodwill impairment charges	—		—		47,244		47,244
Cumulative goodwill impairment charges, December 31, 2016	$	17,038	$	32,265	$	70,299	$	119,602

e balances and changes in Intangible assets - net are as follows (in thousands of dollars):



		As of December 31,
		2016						2015
	Weighted average life	Gross carrying amount		Accumulated amortization		Net carrying amount		Gross carrying amount		Accumulated amortization		Net carrying amount
Customer lists and relationships	14.2 years	$	424,405	$	175,112	$	249,293	$	452,429	$	148,424	$	304,005
Trademarks, trade names and other	13.8 years	25,353		14,262		11,091		25,764		13,051		12,713
Non-amortized trade names and other		128,282		—		128,282		146,576		—		146,576
Capitalized software	4.2 years	571,978		374,518		197,460		504,283		319,567		184,716
Total intangible assets	8.5 years	$	1,150,018	$	563,892	$	586,126	$	1,129,052	$	481,042	$	648,010

Estimated amortization expense for future periods is as follows (in thousands of dollars):