CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 116,305	$ 192,464
Investments in marketable securities	46,006	31,192
Accounts receivable, net	129,103	138,989
Inventories	151,577	101,457
Prepaid expenses	7,051	7,270
Deferred tax assets, net	11,857	42,327
Other current assets	35,756	32,772
Total current assets	497,655	546,471
Property, plant and equipment, net	469,943	352,188
Goodwill	3,376	3,376
Intangible assets, net	22,732	27,421
Deferred tax assets - noncurrent, net	48,957	32,655
Other noncurrent assets, net	12,605	15,991
Total assets	1,055,268	978,102
Current liabilities:
Accounts payable	67,812	79,154
Accrued payroll	28,519	35,965
Other accrued liabilities	9,901	12,128
Total current liabilities	106,232	127,247
Long-term liabilities:
Long-term income tax liability	735	7,350
Other long-term liabilities	11,013	9,486
Total liabilities	117,980	144,083
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred Stock, $0.001 par value, 5,000,000 shares authorized, no shares issued	0	0
Common stock, $0.001 par value, 600,000,000 shares authorized, 166,125,215 and 161,463,280 shares issued and outstanding at December 31, 2011 and December 31, 2010, respectively	166	161
Additional paid-in capital	678,412	622,958
Accumulated other comprehensive income	140	480
Retained earnings	258,570	210,420
Total stockholders' equity	937,288	834,019
Total liabilities and stockholders' equity	$ 1,055,268	$ 978,102