GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

The balances and changes in the carrying amount of Goodwill by segment, including cumulative goodwill impairment charges are as follows (in thousands of dollars):



	United States			Canada			Other businesses			Total
Balance at January 1, 2017	$	202,020		$	122,140		$	202,990		$	527,150
Divestiture	(3,316		)	—			—			(3,316		)
Impairment	(7,169		)	—			—			(7,169		)
Translation	—			8,282			18,956			27,238
Balance at December 31, 2017	191,535			130,422			221,946			543,903
Divestiture	—			—			—			—
Impairment	—			—			(104,461		)	(104,461		)
Translation	—			(3,304		)	(6,320		)	(9,624		)
Balance at September 30, 2018	$	191,535		$	127,118		$	111,165		$	429,818



Cumulative goodwill impairment charges, December 31, 2017	$	24,207	$	32,265	$	70,299	$	126,771
Impairment	—		—		104,461		104,461
Cumulative goodwill impairment charges, September 30, 2018	$	24,207	$	32,265	$	174,760	$	231,232

Schedule of Finite-Lived Intangible Assets By Major Class

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



		September 30, 2018						December 31, 2017
	Weighted average life	Gross carrying amount		Accumulated amortization		Net carrying amount		Gross carrying amount		Accumulated amortization		Net carrying amount
Customer lists and relationships	14.3 years	$	413,216	$	199,645	$	213,571	$	430,026	$	195,842	$	234,184
Trademarks, trade names and other	14.5 years	24,073		14,945		9,128		25,886		16,054		9,832
Non-amortized trade names and other		99,172		—		99,172		137,491		—		137,491
Capitalized software	4.2 years	652,501		494,851		157,650		632,431		444,823		187,608
Total intangible assets	8.2 years	$	1,188,962	$	709,441	$	479,521	$	1,225,834	$	656,719	$	569,115