Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Contract revenues	$ 163,119	$ 174,557
Costs of contract revenues	143,129	163,875
Gross profit	19,990	10,682
General and administrative expenses	20,089	17,948
(Gain) loss on sale of assets—net	(10)	(8)
Operating loss	(89)	(7,258)
Interest expense—net	(5,721)	(5,630)
Equity in loss of joint ventures	(115)	(1,098)
Other expense	(763)	(441)
Loss before income taxes	(6,688)	(14,427)
Income tax benefit	2,653	6,037
Net loss	$ (4,035)	$ (8,390)
Basic loss per share	$ (0.07)	$ (0.14)
Basic weighted average shares	60,507	60,265
Diluted loss per share	$ (0.07)	$ (0.14)
Diluted weighted average shares	60,507	60,265