Contingencies - Accrual for Environmental Remediation Table (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2012
Notes to Financial Statements
Environmental remediation accrual at December 31, 2011	$ 239
Payments	(91)
Environmental remediation accrual at September 30, 2012	$ 148

Total costs accrued as of the balance sheet date for environmental loss contingencies.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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