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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Operating activities |  |  |
Net income | $ 59,379 | $ 42,694 | $ 54,434
Adjustments to reconcile to net cash provided by operations: |  |  |
Depreciation, depletion and amortization | 69,500 | 69,313 | 65,839
Amortization of debt issue costs and original issue discount | 3,177 | 8,838 | 2,758
Pension expense, net of unfunded benefits paid | 10,427 | 2,127 | 8,637
Deferred income tax provision (benefit) | (2,209) | 333 | (16,815)
Gains on dispositions of plant, equipment and timberlands, net | (9,815) | (3,950) | (453)
Share-based compensation | 6,520 | 5,762 | 5,767
Change in operating assets and liabilities |  |  |
Accounts receivable | (3,379) | 3,771 | (598)
Inventories | (12,615) | (7,280) | (7,592)
Prepaid and other current assets | (14,952) | 2,115 | (13,318)
Accounts payable | 6,953 | 13,606 | 21,064
Environmental matters | (151) | (57) | (29)
Accruals and other current liabilities | 15,134 | (2,516) | (1,490)
Cellulosic biofuel and alternative fuel mixture credits | (6,728) | 17,833 | 54,880
Other | (8,395) | (12,282) | (5,079)
Net cash provided by operating activities | 112,846 | 140,307 | 168,005
Investing activities |  |  |
Expenditures for purchases of plant, equipment and timberlands | (58,752) | (64,491) | (36,491)
Proceeds from disposals of plant, equipment and timberlands, net | 10,272 | 4,491 | 564
Proceeds from timberland installment sale note receivable |  | 43,170 |
Acquisitions, net of cash acquired |  |  | (228,290)
Other | (225) |  |
Net cash used by investing activities | (48,705) | (16,830) | (264,217)
Financing activities |  |  |
Proceeds from note offerings | 250,000 |  | 95,000
Repayments of note offerings | (205,131) | (103,563) |
Net borrowings under (repayments of) revolving credit facility | (27,000) | 27,000 |
Payments of note offering costs | (4,748) | (1,672) | (5,340)
Repayment of term loans |  | (36,695) | (14,000)
Net repayments of other short term debt |  | (798) | (3,208)
Repurchases of common stock | (5,675) | (48,033) |
Payments of dividends | (15,608) | (16,611) | (16,746)
Proceeds from stock options exercised and other | 2,673 | 232 | 3,975
Net cash (used) provided by financing activities | (5,489) | (180,140) | 59,681
Effect of exchange rate changes on cash | 750 | (848) | (3,101)
Net increase (decrease) in cash and cash equivalents | 59,402 | (57,511) | (39,632)
Cash and cash equivalents at the beginning of period | 38,277 | 95,788 | 135,420
Cash and cash equivalents at the end of period | 97,679 | 38,277 | 95,788
Cash paid (received) for: |  |  |
Interest, net of amounts capitalized | 14,400 | 24,191 | 23,193
Income taxes, net | $ 44,657 | $ (8,344) | $ (40,265)

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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 95-13 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Cash outflow in the form of ordinary dividends to common shareholders, generally out of earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15, 17 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration