CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 116,653	$ 116,305
Investments in marketable securities	22,305	46,006
Accounts receivable, net	132,729	129,103
Inventories	138,246	151,577
Prepaid expenses	8,938	7,051
Deferred tax assets, net	12,530	11,857
Other current assets	48,382	35,756
Total current assets	479,783	497,655
Property, plant and equipment, net	448,741	469,943
Goodwill	4,391	3,376
Intangible assets, net	23,163	22,732
Deferred tax assets - noncurrent, net	57,185	48,957
Other noncurrent assets, net	40,415	12,605
Total assets	1,053,678	1,055,268
Current liabilities:
Accounts payable	65,388	67,812
Accrued payroll	33,254	28,519
Other accrued liabilities	15,132	9,901
Total current liabilities	113,774	106,232
Long-term liabilities:
Long-term income tax liability	2,809	735
Cross-licensing liability	12,818	0
Other long-term liabilities	15,878	11,013
Total liabilities	145,279	117,980
Commitments and contingencies (Note 10)
Stockholders’ equity:
Preferred Stock, $0.001 par value, 5,000 shares authorized, no shares issued	0	0
Common stock, $0.001 par value, 600,000 shares authorized, 160,611 and 166,125 shares issued and outstanding at December 31, 2012 and December 31, 2011, respectively	161	166
Additional paid-in capital	676,203	678,412
Accumulated other comprehensive (loss) income	(366)	140
Retained earnings	232,401	258,570
Total stockholders’ equity	908,399	937,288
Total liabilities and stockholders’ equity	$ 1,053,678	$ 1,055,268