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Reportable Operating Segments (Tables)

12 Months Ended

Dec. 31, 2012

Reportable Operating Segments

Schedule of revenue by segment

		Year Ended December 31,
		2012					2011					2010
Business Segment		Revenue			% of Segment Revenue		Revenue			% of Segment Revenue		Revenue			% of Segment Revenue
East Construction Services		$	662,248		43.0	%	$	528,745		36.2	%	$	480,533		51.0	%
West Construction Services		832,860			54.0	%	881,733			60.4	%	402,273			42.7	%
Engineering		46,626			3.0	%	49,672			3.4	%	58,959			6.3	%
Total		$	1,541,734		100.0	%	$	1,460,150		100.0	%	$	941,765		100.0	%

Schedule of gross profit by segment

		Year Ended December 31,
		2012					2011					2010
Business Segment		Gross Profit			% of Segment Revenue		Gross Profit			% of Segment Revenue		Gross Profit			% of Segment Revenue
East Construction Services		$	63,811		9.6	%	$	57,118		10.8	%	$	48,770		10.1	%
West Construction Services		119,328			14.3	%	118,385			13.4	%	61,897			15.4	%
Engineering		9,571			20.5	%	9,700			19.5	%	12,122			20.6	%
Total		$	192,710		12.5	%	$	185,203		12.7	%	$	122,789		13.0	%

Schedule of amount of goodwill recorded by segment

Segment		2012			2011

East Construction Services		$	69,859		$	59,659
West Construction Services		44,641			32,079
Engineering		2,441			2,441
Total		$	116,941		$	94,179

Schedule of revenue and total assets by geographic area

		External Revenues															Total Assets
		Year Ended December 31,															At December 31,
		2012					2011					2010					2012			2011
Country		Revenue			% of Revenue		Revenue			% of Revenue		Revenue			% of Revenue

United States		$	1,530,819		99.3	%	$	1,447,863		99.2	%	$	920,051		97.7	%	$	920,872		$	719,028
Non-United States		10,915			0.7	%	12,287			0.8	%	21,714			2.3	%	10,335			9,385
Total		$	1,541,734		100.0	%	$	1,460,150		100.0	%	$	941,765		100.0	%	$	931,207		$	728,413