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Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 State of Michigan [Member] | Dec. 31, 2011 State of Illinois [Member] | Dec. 31, 2012 United Kingdom [Member] | Dec. 31, 2010 United Kingdom [Member] | Dec. 31, 2012 Canada [Member]
Changes in tax laws on net earnings from continuing operations and net earnings per diluted common share |  |  |  |  |
Tax Jurisdiction | State of Michigan | State of Illinois | United Kingdom | United Kingdom | Canada
Enactment Date | May 25, 2011 | Jan. 13, 2011 | Jul. 17, 2012 | Jul. 27, 2010 | Jun. 20, 2012
Net Earnings | $ (5,350) | $ (1,221) | $ (856) | $ 400 | $ (671)

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