Consolidated Balance Sheets (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 758,939	$ 630,299
Accounts receivable, net	462,470	362,863
Inventories	466,248	450,028
Prepaid expenses and other current assets	11,443	15,482
Deferred income taxes	17,153	17,288
Total current assets	1,716,253	1,475,960
Property, plant and equipment, net	1,195,508	1,170,334
Equity investments	47,280	46,314
Restricted cash	116,729	150,288
Other assets, net	131,409	111,248
Total assets	3,207,179	2,954,144
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	196,393	204,774
Accrued liabilities	135,169	118,804
Total current liabilities	331,562	323,578
Long-term debt	764,543	764,482
Deferred income taxes	335,347	315,518
Other liabilities	46,604	45,496
Total liabilities	1,478,056	1,449,074
Commitments and contingencies (Notes 6 and 14)
Stockholders' equity
Preferred stock, $0.01 par value, 50,000,000 shares authorized; no shares issued and outstanding
Common stock, $0.01 par value, 150,000,000 shares authorized; 66,602,742 and 66,256,144 shares issued and outstanding in 2011 and 2010, respectively	666	663
Common stock, held in treasury, at cost; 54,654 shares in 2011	(2,018)
Additional paid-in capital	466,149	452,703
Retained earnings	1,277,901	1,058,737
Accumulated other comprehensive income
Benefits liability, net of tax	(11,481)	(12,328)
Cumulative translation adjustment	4,565	5,295
Unrealized holding losses on investments, net of tax	(6,659)
Total stockholders' equity	1,729,123	1,505,070
Total liabilities and stockholders' equity	$ 3,207,179	$ 2,954,144