CONDENSED CONSOLIDATED INCOME STATEMENTS (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
CONDENSED CONSOLIDATED INCOME STATEMENTS [Abstract]
Revenues	$ 350,599	$ 337,726	$ 668,302	$ 633,916
Cost of revenues	282,758	271,297	553,798	499,199
Research and development expenses	23,432	30,268	40,567	60,431
Selling, general and administrative expenses	21,602	23,933	41,013	44,693
Income from operations	22,807	12,228	32,924	29,593
Interest income and other	703	408	12,192	746
Interest expense	(2,804)	(2,341)	(5,337)	(4,702)
Income before income taxes	20,706	10,295	39,779	25,637
Income tax benefit (provision)	511	(3,950)	(6,227)	(10,024)
Net income	$ 21,217	$ 6,345	$ 33,552	$ 15,613
Basic income per share	$ 0.36	$ 0.11	$ 0.57	$ 0.27
Diluted income per share	$ 0.36	$ 0.11	$ 0.56	$ 0.27