5. Goodwill

Goodwill represents the excess of the purchase price over the fair value of identifiable net assets acquired in business combinations. Current U.S. accounting guidance provides that goodwill and indefinite-lived intangible assets be tested for impairment at least annually. The Company performs the required valuation procedures each year as of December 31 after the following year’s forecasts are submitted and reviewed. The valuations performed in 2015, 2014 and 2013 indicated no impairment of goodwill.

The changes in the carrying amount of goodwill by reporting segment during the years ended December 31, 2015 and 2014 are as follows:

	Infrastructure Group			Aggregate and Mining Group			Energy Group		Corporate		Total
Balance, December 31, 2013	$	8,719		$	6,338		$	--	$	--	$	15,057
Acquisition		--			18,256			--		--		18,256
Foreign currency translation		(135	)		(1,183	)		--		--		(1,318	)
Balance, December 31, 2014		8,584			23,411			--		--		31,995
Purchase price adjustment		--			(178	)		--		--		(178	)
Foreign currency translation		(103	)		(879	)		--		--		(982	)
Balance, December 31, 2015	$	8,481		$	22,354		$	--	$	--	$	30,835