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Debt - Table (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Debt [Abstract]    
Industrial development authority monthly 5.6% fixed rate demand bonds maturing 2018 $ 5,000 $ 5,000
Industrial development authority monthly 5.26% fixed rate demand bonds maturing 2028 10,000 10,000
Credit facilities (1.96% weighted average borrowing rate at December 31, 2012) 12,200 28,500
Ohio Department of Development Term Loan 2,754 3,076
Other debt obligations (including capital leases) 1,514 761
Debt And Capital Lease Obligations 31,468 47,337
Short-term Debt (867) 0
Current portion of long-term debt (601) (636)
Long Term Debt And Capital Lease Obligations $ 30,000 $ 46,701