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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Thousands
9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Cash flows from continuing operating activities:  
Net income$ 55,854$ 11,525
Adjustments to reconcile net income to net cash provided by continuing operating activities:  
Net loss from discontinued operations128122
Deferred income taxes2,2162,325
Losses on extinguishment of debt13652
Expense associated with modification of secured term loan387 
Expense associated with induced conversion of 5.5% convertible debentures558 
Net gain on carbon credits(92) 
Losses on sales and disposals of property and equipment996508
Gain on property insurance recoveries associated with property, plant and equipment (3,964)
Depreciation of property, plant and equipment13,86112,880
Amortization354466
Stock-based compensation761752
Provision for (recovery of) losses on accounts receivable160(14)
Provision for (realization of) losses on inventory1,351(86)
Realization of losses on firm sales commitments (337)
Equity in earnings of affiliate(375)(719)
Distributions received from affiliate1,223425
Changes in fair value of commodities contracts482(141)
Changes in fair value of interest rate contracts635344
Other (10)
Cash provided (used) by changes in assets and liabilities (net of effects of discontinued operations):  
Accounts receivable(11,777)(14,373)
Inventories(15,392)(1,967)
Other supplies, prepaid items and other(2,838)1,449
Accounts payable3,7446,635
Accrued payroll and benefits(2,020)1,794
Accrued and prepaid income taxes(7,538)319
Customer deposits5,3952,306
Other current and noncurrent liabilities4,3222,394
Net cash provided by continuing operating activities52,53122,685
Cash flows from continuing investing activities:  
Capital expenditures(31,145)(26,129)
Proceeds from property insurance recoveries associated with property, plant and equipment 5,293
Proceeds from sales of property and equipment19044
Proceeds from short-term investments10,01220,053
Purchases of short-term investments(9)(20,006)
Deposits of restricted cash(481)(167)
Proceeds from sales of carbon credits1,665 
Payments on contractual obligations - carbon credits(1,573) 
Other assets(635)(427)
Net cash used by continuing investing activities(21,976)(21,339)
Cash flows from continuing financing activities:  
Proceeds from revolving debt facility498,858394,221
Payments on revolving debt facility(498,858)(394,221)
Proceeds from modification of secured term loan, net of fees10,347 
Proceeds from secured term loan, net of fees14,766 
Proceeds from other long-term debt, net of fees 47
Payments associated with induced conversion of 5.5% convertible debentures(558) 
Acquisition of 5.5% convertible debentures (2,494)
Payments on other long-term debt(12,001)(3,370)
Payments on loans secured by cash value of life insurance policies(84)(380)
Payments of debt issuance costs(112) 
Payments on short-term financing(3,435)(3,017)
Proceeds from exercise of stock options974347
Purchase of treasury stock (2,421)
Excess income tax benefit associated with stock-based compensation1,100212
Dividends paid on preferred stocks(305)(305)
Net cash provided (used) by continuing financing activities10,692(11,381)
Cash flows of discontinued operations:  
Operating cash flows(210)(267)
Net increase (decrease) in cash and cash equivalents41,037(10,302)
Cash and cash equivalents at beginning of period66,94661,739
Cash and cash equivalents at end of period107,98351,437
Supplemental cash flow information:  
Cash payments for income taxes, net of refunds37,7575,993
Noncash investing and financing activities:  
Receivable associated with a property insurance claim 171
Accounts payable and long-term debt associated with property, plant and equipment4,3327,272
Debt issuance costs incurred associated with secured term loan839 
Debt issuance costs written off associated with 5.5% debentures35058
Accrued liabilities extinguished associated with 5.5% debentures342 
5.5% debentures converted to common stock$ 26,400