| Schedule of Accrued Liabilities [Table Text Block] |
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|
|
December 31,
2013
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|
|
December 31,
2012
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|
|
|
(in thousands)
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|
|
Insurance
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|
$
|
7,222
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|
|
$
|
12,307
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|
Reserve for plant closure costs
|
|
|
595
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|
|
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—
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Reserve for U.S. Attorney investigation
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|
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—
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|
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7,655
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|
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Salary and benefits
|
|
|
9,423
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|
|
|
4,989
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|
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Trade creditors
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|
|
5,100
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|
|
|
3,914
|
|
|
Taxes, other than income tax
|
|
|
64
|
|
|
|
42
|
|
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Income tax
|
|
|
4,132
|
|
|
|
—
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Deferred revenue
|
|
|
2,362
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|
|
|
2,060
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|
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Contractual obligations
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|
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—
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|
|
|
470
|
|
|
Accrued interest
|
|
|
200
|
|
|
|
225
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|
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Other
|
|
|
47
|
|
|
|
79
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|
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Total accrued liabilities
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|
$
|
29,145
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|
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$
|
31,741
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