v2.4.0.6
Consolidated Statements Of Cash Flows (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Cash flows from operating activities      
Net income $ 258,966,000 $ 221,393,000 $ 52,995,000
Adjustments to reconcile net income to net cash provided by operating activities      
Depreciation and amortization 131,397,000 128,732,000 123,199,000
Provision for doubtful accounts 1,321,000 917,000 1,970,000
Amortization of debt issue costs 1,683,000 2,154,000 1,461,000
Stock-based compensation expense 6,391,000 6,164,000 5,638,000
Loss from disposition of fixed assets 1,375,000 581,000 2,711,000
Impairment of long-lived assets 1,975,000    
Gain on involuntary conversion of assets     (455,000)
Deferred income taxes 14,114,000 14,153,000 31,207,000
Equity in income of joint ventures (427,000) (2,212,000) (3,818,000)
Changes in operating assets and liabilities      
Accounts receivable (45,766,000) (33,478,000) 5,667,000
Inventories (40,749,000) (80,611,000) (41,450,000)
Prepaid expenses and other current assets 2,987,000 (7,217,000) (236,000)
Accounts payable 20,311,000 25,644,000 67,044,000
Accrued liabilities 18,785,000 9,910,000 8,308,000
Other, net (10,067,000) (2,846,000) (18,719,000)
Net cash provided by operating activities 362,296,000 283,284,000 235,522,000
Cash flows from investing activities      
Acquisition of business     (6,297,000)
Additions to equity investments   (10,177,000)  
Additions to property, plant and equipment (176,843,000) (81,269,000) (99,769,000)
Proceeds from disposition of assets 2,880,000 914,000 3,255,000
Proceeds from insurance for involuntary conversion of assets     484,000
Proceeds from repayment of loan to affiliate 1,192,000 763,000  
Purchase of securities and other investments (30,265,000)    
Settlements of derivative instruments 251,000 9,494,000 (859,000)
Net cash used for investing activities (202,785,000) (80,275,000) (103,186,000)
Cash flows from financing activities      
Capitalized debt issuance costs (2,697,000) (3,331,000) (2,203,000)
Dividends paid (18,265,000) (16,014,000) (14,510,000)
Proceeds from exercise of stock options 5,344,000 3,745,000 879,000
Repurchase of common stock for treasury (2,518,000)      
Utilization of restricted cash 54,227,000 197,298,000 38,851,000
Net cash provided by financing activities 36,091,000 181,698,000 23,017,000
Net increase in cash and cash equivalents 195,602,000 384,707,000 155,353,000
Cash and cash equivalents at beginning of the year 630,299,000 245,592,000 90,239,000
Cash and cash equivalents at end of the year 825,901,000 630,299,000 245,592,000
Supplemental cash flow information      
Interest paid (net of interest capitalized) 48,431,000 33,980,000 33,394,000
Income taxes paid (refunded) 126,283,000 108,218,000 (40,741,000)
Series 2009A Revenue Bonds [Member]
      
Non-cash financing activity:      
Proceeds from borrowings related to revenue bonds (in restricted cash)     4,900,000
6 1/2% Tax-Exempt Revenue Bonds Due 2029 [Member]
      
Non-cash financing activity:      
Proceeds from borrowings related to revenue bonds (in restricted cash)   93,943,000  
GO Zone 6 1/2% Tax-Exempt Revenue Bonds Due 2035 [Member]
      
Non-cash financing activity:      
Proceeds from borrowings related to revenue bonds (in restricted cash)   87,940,000  
IKE Zone 6 1/2% Tax-Exempt Revenue Bonds Due 2035 [Member]
      
Non-cash financing activity:      
Proceeds from borrowings related to revenue bonds (in restricted cash)   $ 64,209,000