Condensed Consolidated 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
Revenues	$ 259,599	$ 261,193	$ 767,691	$ 694,666
Cost of revenues	210,276	201,272	626,712	539,185
Selling, general and administrative expenses	20,878	20,802	62,135	57,770
Other operating income, net	(311)	(60)	(802)	(1,012)
Operating income	28,756	39,179	79,646	98,723
Foreign currency exchange loss	185	485	416	340
Interest expense, net	2,416	2,464	7,337	6,821
Income from operations before income taxes	26,155	36,230	71,893	91,562
Provision for income taxes	7,413	13,233	23,054	33,431
Net income	$ 18,742	$ 22,997	$ 48,839	$ 58,131
Income per common share -basic: (in Dollars per share)	$ 0.22	$ 0.25	$ 0.55	$ 0.65
Income per common share -diluted: (in Dollars per share)	$ 0.20	$ 0.23	$ 0.50	$ 0.58