Revenue (Tables)

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following series of tables presents our revenue disaggregated by various categories (dollars in thousands).

	Years Ended December 31,
	Workforce Excellence							Business Transformation Services							Consolidated
	2018			2017		2016		2018			2017		2016		2018			2017		2016
Revenue by type of service:
Managed learning services	$	206,388		207,007		204,007		$	—		—				$	206,388		207,007		204,007
Engineering & technical services	110,426			101,252		101,908		—			—				110,426			101,252		101,908
Sales enablement	—			—		—		103,740			101,196		101,939		103,740			101,196		101,939
Organizational development	—			—		—		94,606			99,753		82,705		94,606			99,753		82,705
	$	316,814		308,259		305,915		$	198,346		200,949		184,644		$	515,160		509,208		490,559
Revenue by geographic region:
Americas	$	213,938		198,653		198,393		$	165,807		175,027		164,727		$	379,745		373,680		363,120
Europe Middle East Africa	91,764			100,296		97,274		38,171			30,461		22,603		129,935			130,757		119,877
Asia Pacific	30,688			29,828		30,173		2,634			376		450		33,322			30,204		30,623
Eliminations	(19,576		)	(20,518	)	(19,925	)	(8,266		)	(4,915	)	(3,136	)	(27,842		)	(25,433	)	(23,061	)
	$	316,814		308,259		305,915		$	198,346		200,949		184,644		$	515,160		509,208		490,559
Revenue by client market sector:
Automotive	$	10,646		10,102		7,672		$	105,431		101,285		101,627		$	116,077		111,387		109,299
Financial & Insurance	87,813			86,718		87,102		12,303			16,339		15,792		100,116			103,057		102,894
Manufacturing	33,055			35,795		37,135		16,156			17,134		8,625		49,211			52,929		45,760
Energy / Oil & Gas	37,088			34,195		35,580		4,752			2,429		3,258		41,840			36,624		38,838
U.S. Government	29,584			25,254		25,011		8,782			9,475		10,191		38,366			34,729		35,202
U.K. Government	18,733			27,734		25,487		—			—		—		18,733			27,734		25,487
Information & Communication	14,083			18,123		19,410		9,510			10,490		7,942		23,593			28,613		27,352
Aerospace	25,989			22,142		21,262		3,683			6,549		1,189		29,672			28,691		22,451
Electronics Semiconductor	15,070			16,449		23,253		857			1,069		821		15,927			17,518		24,074
Life Sciences	15,009			8,420		7,113		8,750			9,377		10,433		23,759			17,797		17,546
Other	29,744			23,327		16,890		28,122			26,802		24,766		57,866			50,129		41,656
	$	316,814		308,259		305,915		$	198,346		200,949		184,644		$	515,160		509,208		490,559