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Debt Narrative - Senior Secured Notes and Revolving Credit Facility - Food Packaging (Details) (Food Packaging Segment [Member], USD $) | 6 Months Ended |  |  |  | 6 Months Ended
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Jun. 30, 2013 Secured Debt [Member] Viskase Notes Indenture [Member] | May 31, 2010 Secured Debt [Member] Viskase Notes Indenture [Member] | Dec. 31, 2009 Secured Debt [Member] Viskase Senior Secured Notes due 2018 [Member] | Jun. 30, 2013 Secured Debt [Member] Letter of Credit [Member] | Jun. 30, 2013 Unsecured Debt [Member] Line of Credit [Member] | Jun. 30, 2013 Debt repurchase date range, Prior to January 15, 2014 [Member] Secured Debt [Member] Viskase Notes Indenture [Member]
Debt Instrument [Line Items] |  |  |  |  |  |
Aggregate principal amount issued, long-term debt |  | $ 40,000,000 | $ 175,000,000 |  |  |
Interest rate, long-term debt |  |  | 9.875% |  |  |
Redemption percentage of aggregate principal amount authorized to be redeemed at higher percenatge of principal amount | 35.00% |  |  |  |  |
Redemption percentage of principal amount |  |  |  |  |  | 109.875%
Percentage of aggregate principal amount required to remain outstanding if debt redeemed at higher percenatge of principal amount | 65.00% |  |  |  |  |
Line of credit facility |  |  |  |  | 8,000,000 |
Line of credit facility, outstanding borowings |  |  |  |  | 0 |
Letters of Credit Outstanding, Amount |  |  |  | $ 1,000,000 |  |

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 + Details
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