Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash	$ 17,215	$ 8,439
Restricted cash	770	769
Short-term investments	20,000	55,001
Receivables, net	171,394	176,189
Taxes receivable	13,813	10,000
Inventories	237,623	244,071
Deferred tax assets	25,878	39,466
Prepaid expenses	8,446	11,396
Total current assets	495,139	545,331
Property, plant and equipment, net	801,818	735,566
Goodwill	229,533	229,533
Intangible assets, net	46,485	49,748
Other assets, net	10,088	11,140
TOTAL ASSETS	1,583,063	1,571,318
Current liabilities:
Accounts payable and accrued liabilities	151,997	144,631
Current liability for pensions and other postretirement employee benefits	9,861	9,861
Total current liabilities	161,858	154,492
Long-term debt	523,810	523,694
Liability for pensions and other postretirement employee benefits	199,196	215,932
Other long-term obligations	47,435	48,474
Accrued taxes	77,990	74,464
Deferred tax liabilities	70,528	69,358
Stockholders' equity:
Preferred stock, par value $0.0001 per share, 5,000,000 authorized shares, no shares issued
Common stock, par value $0.00005 per share, 100,000,000 authorized shares, 23,825,750 and 23,101,710 shares issued	1	1
Additional paid-in capital	312,519	315,965
Retained earnings	320,768	295,553
Treasury stock, at cost, common shares-571,782 and 333,300 shares repurchased	(18,819)	(11,350)
Accumulated other comprehensive loss, net of tax	(112,223)	(115,265)
Total stockholders' equity	502,246	484,904
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,583,063	$ 1,571,318