CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS (UNAUDITED) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS (UNAUDITED) [Abstract]
Revenues	$ 1,099,393	$ 1,166,410	$ 2,997,273	$ 2,601,557
Cost of Operations	983,930	1,046,055	2,708,590	2,331,529
Gross Profit	115,463	120,355	288,683	270,028
General and Administrative Expenses	60,787	58,319	194,644	152,444
Goodwill and Intangible Asset Impairment	0	0	376,574	0
INCOME (LOSS) FROM CONSTRUCTION OPERATIONS	54,676	62,036	(282,535)	117,584
Other Income (Expense), net	545	5,863	(681)	6,648
Interest Expense	(11,039)	(11,566)	(32,724)	(25,973)
Income (Loss) before Income Taxes	44,182	56,333	(315,940)	98,259
(Provision) Benefit for Income Taxes	(1,591)	(20,856)	8,905	(36,159)
NET INCOME (LOSS)	$ 42,591	$ 35,477	$ (307,035)	$ 62,100
BASIC EARNINGS (LOSS) PER COMMON SHARE (in dollars per share)	$ 0.90	$ 0.75	$ (6.47)	$ 1.32
DILUTED EARNINGS (LOSS) PER COMMON SHARE (in dollars per share)	$ 0.88	$ 0.74	$ (6.47)	$ 1.30
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
BASIC (in shares)	47,556	47,291	47,440	47,192
Effect of Dilutive Stock Options and Restricted Stock Units Outstanding (in shares)	661	473	0	670
DILUTED (in shares)	48,217	47,764	47,440	47,862