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Business and Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2012
Accounting Policies [Abstract]  
Investment in Kinross
(in thousands) Year ended
December 31,
  2012 2011
Shares 670  850
Fair value    
  Current assets $3,110  $4,361
  Long term assets $3,983  $5,329
     
Sales of Kinross
(in thousands) Year ended
December 31,
  2012 2011
Shares sold 180 130
Proceeds $1,591 $2,035
Gain on sale $1,464 $1,937
Marketable Securities
(in thousands) December 31, 2012 December 31, 2011
  Marketable equity securities at fair value $7,093  $10,361 
  Cost 851  988 
  Accumulated other comprehensive income for
    unrealized holding gains		 6,242   9,373 
  Deferred taxes on accumulated other comprehensive
    income for unrealized holding gains		 2,328  3,496 
Accumulated other comprehensive income $3,914  $5,877 
Changes in Marketable Securities
(in thousands) Year ended
December 31,
  2012  2011 
Gross cash proceeds $1,664  $2,035 
Cost 137  98 
Gross gain on sale included in earnings during the period 1,527  1,937 
Deferred taxes on gross gain on sale included in earnings (570)   (722)
Reclassification adjustment to unrealized gain in other
   comprehensive income for net gains included in earnings		 (957) (1,215)
Gross unrealized holding gain (loss) arising during the period
   included in other comprehensive loss.		 (1,603) (7,488)
Deferred taxes on unrealized holdings (gain) loss included in
   other comprehensive loss		 597  2,794 
Net unrealized holding gain (loss) (1,006) (4,694)
Other comprehensive income (loss) from marketable equity
   Securities		 (1,963) $(5,909)