Goodwill & Other Intangible Assets

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill & Other Intangible Assets

Goodwill

Changes in the carrying amount of goodwill by reportable business segment for the years ended December 31, 2018 and 2017 were as follows (in thousands):

				Business
	Workforce			Transformation
	Excellence			Services			Total
Net book value at
January 1, 2017
Goodwill	$	104,345		$	38,844		$	143,189
Accumulated impairment losses	(9,050		)	(6,367		)	(15,417		)
Total	95,295			32,477			127,772
2017 Activity:
Acquisitions	6,424			6,286			12,710
Foreign currency translation	4,045			308			4,353
Net book value at
December 31, 2017
Goodwill	114,814			45,438			160,252
Accumulated impairment losses	(9,050		)	(6,367		)	(15,417		)
Total	105,764			39,071			144,835
2018 Activity:
Acquisitions	21,613			14,033			35,646
Foreign currency translation	(3,459		)	(898		)	(4,357		)
Net book value at
December 31, 2018
Goodwill	132,968			58,573			191,541
Accumulated impairment losses	(9,050		)	(6,367		)	(15,417		)
Total	$	123,918		$	52,206		$	176,124

Intangible Assets Subject to Amortization

Intangible assets with finite lives are subject to amortization over their estimated useful lives. The primary assets included in this category and their respective balances were as follows (in thousands):

December 31, 2018
	Gross Carrying		Accumulated			Net Carrying
	Amount		Amortization			Amount
Customer relationships	$	26,524	$	(8,547	)	$	17,977
Intellectual property and other	4,936		(1,980		)	2,956
	$	31,460	$	(10,527	)	$	20,933
December 31, 2017
Customer relationships	$	16,330	$	(11,140	)	$	5,190
Intellectual property and other	4,298		(1,125		)	3,173
	$	20,628	$	(12,265	)	$	8,363

Amortization expense for intangible assets was $4.6 million, $4.0 million and $3.5 million for the years ended December 31, 2018, 2017 and 2016, respectively. Estimated future amortization expense for intangible assets included in our consolidated balance sheet as of December 31, 2018 is as follows (in thousands):

Fiscal year ending:
2019	$	4,968
2020	3,844
2021	3,211
2022	2,027
2023	1,799
Thereafter	5,084
Total	$	20,933

As of December 31, 2018, our intangible assets with definite lives had a weighted average remaining useful life of 6.2 years. We have no amortizable intangible assets with indefinite useful lives.