Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	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)