CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS
Revenues	$ 1,340,739	$ 1,250,689	$ 3,719,642	$ 3,290,432
Cost of operations	1,240,538	1,109,848	3,430,062	2,914,713
Gross profit	100,201	140,841	289,580	375,719
General and administrative expenses	61,227	70,487	199,641	198,425
INCOME FROM CONSTRUCTION OPERATIONS	38,974	70,354	89,939	177,294
Other income (expense), net	5,916	(441)	5,261	(10,788)
Interest expense	(10,935)	(11,297)	(33,048)	(32,985)
Income before income taxes	33,955	58,616	62,152	133,521
Provision for income taxes	(14,278)	(22,886)	(25,572)	(53,307)
NET INCOME	$ 19,677	$ 35,730	$ 36,580	$ 80,214
BASIC EARNINGS PER COMMON SHARE (in dollars per share)	$ 0.40	$ 0.74	$ 0.75	$ 1.65
DILUTED EARNINGS PER COMMON SHARE (in dollars per share)	$ 0.40	$ 0.73	$ 0.74	$ 1.64
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
BASIC (in shares)	49,070	48,588	48,951	48,525
Effect of dilutive stock options and restricted stock units (in shares)	705	487	767	495
DILUTED (in shares)	49,775	49,075	49,718	49,020