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Business and Summary of Significant Accounting Policies - Marketable Securities (Details) (USD $) | 12 Months Ended
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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

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