(6) Goodwill and Intangible Assets

There were no changes in goodwill for the nine months ended September 30, 2014. Goodwill by operating segment as of December 31, 2013 and September 30, 2014 is as follows (in thousands):

	Supply Chain Management		IT, Energy and Management Consulting		Total
Balance as of December 31, 2013	$	61,169	$	30,883	$	92,052
Balance as of September 30, 2014	$	61,169	$	30,883	$	92,052

Intangible assets consist of the value of contract-related assets, acquired technologies and trade names. Amortization expense was approximately $2.5 million and $7.6 million for the three- and nine-month periods ended September 30, 2014 and 2013, respectively.

Intangible assets were comprised of the following (in thousands):

	Cost		Accumulated Amortization			Accumulated Impairment Loss			Net Intangible Assets
September 30, 2014
Contract and customer-related	$	93,304	$	(31,952	)	$	(1,025	)	$	60,327
Acquired technologies		12,400		(3,742	)		-			8,658
Trade names – amortizable		10,100		(4,451	)		-			5,649
Total	$	115,804	$	(40,145	)	$	(1,025	)	$	74,634

December 31, 2013
Contract and customer-related	$	93,304	$	(26,287	)	$	(1,025	)	$	65,992
Acquired technologies		12,400		(2,896	)		-			9,504
Trade names – amortizable		10,100		(3,339	)		-			6,761
Total	$	115,804	$	(32,522	)	$	(1,025	)	$	82,257