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Business and Summary of Significant Account Policies - Marketable Equity Securities and Accumulated Other Comprehensive Income (Details) (USD $) | Dec. 31, 2013 | Dec. 31, 2012
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Accounting Policies [Abstract] |  |
Marketable equity securities at fair value | $ 3,973,000 | $ 7,093,000
Cost | 1,954,000 | 851,000
Accumulated other comprehensive income for unrealized holding gains | 2,019,000 | 6,242,000
Deferred taxes on accumulated other comprehensive income for unrealized holding gains | (688,000) | (2,328,000)
Valuation allowance on deferred taxes on unrealized holding losses included in other comprehensive loss | (871,000) |
Accumulated other comprehensive income | $ 460,000 | $ 3,914,000

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