Commitments and Contingencies (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
2004 [Member]
Information relative to the Company's insurance coverage
Policy Year	2004
Policy Start Date	Dec. 01, 2003
Policy End Date	Dec. 01, 2004
Insurance Coverage	$ 2.0
Deductible Amount	0.1
Defense Costs Covered	N
Remaining Insurance Covered	2.0
Active Cases and Cases on Appeal	n/a
2005 [Member]
Information relative to the Company's insurance coverage
Policy Year	2005
Policy Start Date	Dec. 01, 2004
Policy End Date	Dec. 01, 2005
Insurance Coverage	10.0
Deductible Amount	0.3
Defense Costs Covered	Y
Remaining Insurance Covered	7.0
Active Cases and Cases on Appeal	Washington
2006 [Member]
Information relative to the Company's insurance coverage
Policy Year	2006
Policy Start Date	Dec. 01, 2005
Policy End Date	Dec. 01, 2006
Insurance Coverage	10.0
Deductible Amount	0.3
Defense Costs Covered	Y
Remaining Insurance Covered	3.7
Active Cases and Cases on Appeal	Hollman
2007 [Member]
Information relative to the Company's insurance coverage
Policy Year	2007
Policy Start Date	Dec. 01, 2006
Policy End Date	Dec. 01, 2007
Insurance Coverage	10.0
Deductible Amount	0.3
Defense Costs Covered	Y
Remaining Insurance Covered	8.0
Active Cases and Cases on Appeal	n/a
2008 [Member]
Information relative to the Company's insurance coverage
Policy Year	2008
Policy Start Date	Dec. 01, 2007
Policy End Date	Dec. 15, 2008
Insurance Coverage	10.0
Deductible Amount	0.5
Defense Costs Covered	Y
Active Cases and Cases on Appeal	Salinas, Grable, Koon, Peppler, Rich, Turner
2009 [Member]
Information relative to the Company's insurance coverage
Policy Year	2009
Policy Start Date	Dec. 15, 2008
Policy End Date	Dec. 15, 2009
Insurance Coverage	10.0
Deductible Amount	1.0
Defense Costs Covered	N
Remaining Insurance Covered	10.0
Active Cases and Cases on Appeal	Athetis, Kandt, Humphreys, Derbyshire
2010 [Member]
Information relative to the Company's insurance coverage
Policy Year	2010
Policy Start Date	Dec. 15, 2009
Policy End Date	Dec. 15, 2010
Insurance Coverage	10.0
Deductible Amount	1.0
Defense Costs Covered	N
Remaining Insurance Covered	10.0
Active Cases and Cases on Appeal	Thompson, Jacobs, Shymko, Doan, Piskura, Juran, Williams
2011 [Member]
Information relative to the Company's insurance coverage
Policy Year	2011
Policy Start Date	Dec. 15, 2010
Policy End Date	Dec. 15, 2011
Insurance Coverage	10.0
Deductible Amount	1.0
Defense Costs Covered	N
Remaining Insurance Covered	10.0
Active Cases and Cases on Appeal	Butler, Wilson, Russell, Bachtel
Jan - Jun 2012 [Member]
Information relative to the Company's insurance coverage
Policy Start Date	Dec. 15, 2011
Policy End Date	Jun. 25, 2012
Insurance Coverage	7.0
Deductible Amount	1.0
Defense Costs Covered	N
Remaining Insurance Covered	7.0
Active Cases and Cases on Appeal	Ramsey, Duensing, Mitchell, City of Warren, Firman, Ricks
Jan - Jun 2012 [Member] | Maximum [Member]
Information relative to the Company's insurance coverage
Policy Month Year	2012-06
Jan - Jun 2012 [Member] | Minimum [Member]
Information relative to the Company's insurance coverage
Policy Month Year	2012-01
Jul - Dec 2012 [Member]
Information relative to the Company's insurance coverage
Policy Start Date	Jun. 25, 2012
Policy End Date	Dec. 15, 2012
Insurance Coverage	12.0
Deductible Amount	1.0
Defense Costs Covered	N
Remaining Insurance Covered	12.0
Active Cases and Cases on Appeal	Norman, Wingard, Manjares
Jul - Dec 2012 [Member] | Maximum [Member]
Information relative to the Company's insurance coverage
Policy Month Year	2012-12
Jul - Dec 2012 [Member] | Minimum [Member]
Information relative to the Company's insurance coverage
Policy Month Year	2012-07
2013 [Member]
Information relative to the Company's insurance coverage
Policy Year	2013
Policy Start Date	Dec. 15, 2012
Policy End Date	Dec. 15, 2013
Insurance Coverage	12.0
Deductible Amount	1.0
Defense Costs Covered	N
Remaining Insurance Covered	$ 12.0
Active Cases and Cases on Appeal	McCarthy, Miller, Fressadi