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Business and Summary of Significant Accounting Policies - Marketable Securities (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Accounting Policies [Abstract]    
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