CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS
Revenues	$ 992,928	$ 912,534
Cost of operations	892,571	826,375
Gross profit	100,357	86,159
General and administrative expenses	64,278	69,196
INCOME FROM CONSTRUCTION OPERATIONS	36,079	16,963
Other expense, net	(827)	(2,308)
Interest expense	(11,336)	(11,082)
Income before income taxes	23,916	3,573
Provision for income taxes	(9,116)	(4,776)
NET INCOME (LOSS)	$ 14,800	$ (1,203)
BASIC EARNINGS (LOSS) PER COMMON SHARE (in dollars per share)	$ 0.31	$ (0.03)
DILUTED EARNINGS (LOSS) PER COMMON SHARE (in dollars per share)	$ 0.31	$ (0.03)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
BASIC (in shares)	47,559	47,330
Effect of dilutive stock options and restricted stock units (in shares)	954
DILUTED (in shares)	48,513	47,330