| Cost Incurred and Insurance Recoveries, Property Destruction and Damage [Table Text Block] | 
|  |  | 
            Property & Equipment
           |  |  | 
            Business Interruption and Other
           |  |  | 
            Total
           |  |  
| 
            Costs incurred through December 31, 2014
           |  | $ | 4,507,000 |  |  | $ | 4,096,000 |  |  | $ | 8,603,000 |  |  
| 
            Insurance proceeds through December 31, 2014 (1)
           |  |  | 7,477,000 |  |  |  | 4,968,000 |  |  |  | 12,445,000 |  |  
| 
            Gain on insurance recoveries
           |  | $ | 2,970,000 |  |  | $ | 872,000 |  |  | $ | 3,842,000 |  |  | 
| Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block] | 
| 
            Amount in Thousands
           |  | 
            2014
           |  |  | 
            2013
           |  |  
|  |  |  |  |  |  |  |  |  |  
| 
            Net revenue
           |  | $ | — |  |  | $ | 1,789 |  |  
| 
            Interest expense
           |  |  | (6 | ) |  |  | (27 | ) |  
| 
            Operating (loss) income from discontinued operations
           |  |  | (2,108 | ) |  |  | 59 |  |  
| 
            Gain on insurance settlement of discontinued operations
           |  |  | 3,842 |  |  |  | — |  |  
| 
            Income tax expense
           |  |  | 46 |  |  |  | 1,627 |  |  
| 
            Income (loss) from discontinued operations
           |  |  | 1,688 |  |  |  | (1,568 | ) |  
|  |  | 
            December 31,
           |  |  | 
            December 31,
           |  |  
| 
            (Amounts in Thousands)
           |  | 
            2014
           |  |  | 
            2013
           |  |  
| 
            Current assets
           |  |  |  |  |  |  |  |  |  
| 
            Accounts receivable, net (1)
           |  | $ | — |  |  | $ | 20 |  |  
| 
            Inventories
           |  |  | — |  |  |  | 37 |  |  
| 
            Other assets
           |  |  | 6 |  |  |  | 3,018 |  |  
| 
            Total current assets
           |  |  | 6 |  |  |  | 3,075 |  |  
| 
            Long-term assets
           |  |  |  |  |  |  |  |  |  
| 
            Property, plant and equipment, net (2)
           |  |  | 644 |  |  |  | 1,330 |  |  
| 
            Total long-term assets
           |  |  | 644 |  |  |  | 1,330 |  |  
| 
            Total assets held for sale
           |  | $ | 650 |  |  | $ | 4,405 |  |  
| 
            Current liabilities
           |  |  |  |  |  |  |  |  |  
| 
            Accounts payable
           |  | $ | 932 |  |  | $ | 2,716 |  |  
| 
            Accrued expenses and other liabilities
           |  |  | 193 |  |  |  | 237 |  |  
| 
            Note payable
           |  |  | — |  |  |  | 35 |  |  
| 
            Total current liabilities
           |  |  | 1,125 |  |  |  | 2,988 |  |  
| 
            Total liabilities held for sale
           |  | $ | 1,125 |  |  | $ | 2,988 |  |  
|  |  | 
            December 31,
           |  |  | 
            December 31,
           |  |  
| 
            (Amounts in Thousands)
           |  | 
            2014
           |  |  | 
            2013
           |  |  
| 
            Current assets
           |  |  |  |  |  |  |  |  |  
| 
            Other assets
           |  | $ | 14 |  |  |  | 39 |  |  
| 
            Total current assets
           |  |  | 14 |  |  |  | 39 |  |  
| 
            Long-term assets
           |  |  |  |  |  |  |  |  |  
| 
            Property, plant and equipment, net (1)
           |  |  | 37 |  |  |  | 37 |  |  
| 
            Total long-term assets
           |  |  | 37 |  |  |  | 37 |  |  
| 
            Total assets not held for sale
           |  | $ | 51 |  |  | $ | 76 |  |  
| 
            Current liabilities
           |  |  |  |  |  |  |  |  |  
| 
            Accounts payable
           |  | $ | 15 |  |  | $ | 15 |  |  
| 
            Accrued expenses and other liabilities
           |  |  | 269 |  |  |  | 342 |  |  
| 
            Environmental liabilities
           |  |  | 728 |  |  |  | 649 |  |  
| 
            Total current liabilities
           |  |  | 1,012 |  |  |  | 1,006 |  |  
| 
            Long-term liabilities
           |  |  |  |  |  |  |  |  |  
| 
            Closure liabilities
           |  |  | 302 |  |  |  | 220 |  |  
| 
            Environmental liabilities
           |  |  | 288 |  |  |  | 382 |  |  
| 
            Total long-term liabilities
           |  |  | 590 |  |  |  | 602 |  |  
| 
            Total liabilities not held for sale
           |  | $ | 1,602 |  |  | $ | 1,608 |  |  |