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Summary of Significant Accounting Policies Corrections to Consolidated Statements of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Net income (loss) | $ 6,514 | $ (4,178) | $ 6,514 | $ (4,178)
Depreciation and amortization | 14,478 | 16,640 |  |
Provision for (recovery of) doubtful accounts | 168 | (963) |  |
Deferred income taxes |  | 0 |  |
Net gains on sales of assets | (50) | (3,202) |  |
ESOP and share-based compensation expense | 2,134 | 1,906 |  |
Realized and Unrealized Gains (Losses) on Derivatives And Investments, Net | 1,949 | 7,038 |  |
Restricted cash | 4,508 | (1,987) |  |
Purchases of short-term investments |  | (4,188) |  |
Sales of short-term investments |  | 3,417 |  |
Short-term investments |  | 0 |  |
Increase (Decrease) in Accounts and Notes Receivable | (2,106) | (2,053) |  |
Increase (Decrease) in Inventories | (5,608) | (2,404) |  |
Increase (Decrease) in Income Taxes Receivable | 251 | 289 |  |
Increase (Decrease) in Prepaid Expense and Other Assets | (85) | 558 |  |
Accounts payable | 2,361 | 3,885 |  |
Accrued payroll expenses and other current liabilities | (2,581) | (3,702) |  |
Other long-term liabilities | (211) | (1,302) |  |
Accrued postretirement benefits | (670) | 351 |  |
Net Cash Provided by (Used in) Operating Activities | 20,427 | 10,105 |  |
Previously Reported |  |  |  |
Net income (loss) |  | (4,178) |  |
Depreciation and amortization |  | 16,640 |  |
Provision for (recovery of) doubtful accounts |  | (963) |  |
Deferred income taxes |  | 0 |  |
Net gains on sales of assets |  | (3,202) |  |
ESOP and share-based compensation expense |  | 1,906 |  |
Realized and Unrealized Gains (Losses) on Derivatives And Investments, Net |  | 7,038 |  |
Restricted cash |  | (1,987) |  |
Purchases of short-term investments |  | 0 |  |
Sales of short-term investments |  | 0 |  |
Short-term investments |  | (7,854) |  |
Increase (Decrease) in Accounts and Notes Receivable |  | (2,053) |  |
Increase (Decrease) in Inventories |  | (2,404) |  |
Increase (Decrease) in Income Taxes Receivable |  | 289 |  |
Increase (Decrease) in Prepaid Expense and Other Assets |  | 558 |  |
Accounts payable |  | 3,885 |  |
Accrued payroll expenses and other current liabilities |  | 3,381 |  |
Other long-term liabilities |  | (1,302) |  |
Accrued postretirement benefits |  | 351 |  |
Net Cash Provided by (Used in) Operating Activities |  | $ 10,105 |  |

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- Definition Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -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 -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -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 -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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