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Property, Plant and Equipment Narrative (Details) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 108,853,000 | $ 126,391,000
McCook facility |  |
Property, Plant and Equipment [Line Items] |  |
Direct payments made on build-to-suit assets |  | 1,000,000
Lease term | 10 years |
Build-to-suit assets | 13,000,000 |
Build-to-suit assets, accumulated depreciation | 700,000 |
Build-to-suit liabilities, total | 11,600,000 |
Build-to-suit liabilites, accrued expenses | 800,000 |
Build-to-suit liabilites, lease obligations | 10,800,000 |
Non cash increase in assets and liabilites not reflected in the statement of cash flows | 8,000,000 | 4,000,000
Property, plant and equipment, gross | 12,961,000 | 0
Construction in progress |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | 7,486,000 | 8,263,000
Related to McCook facility | Construction in progress |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | 6,300,000 | 5,600,000
Website development | Construction in progress |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross |  | 1,200,000
Business improvement projects | Construction in progress |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, gross | $ 1,200,000 | $ 1,400,000

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- Definition Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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