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Business and Summary of Significant Account Policies - Changes in Marketable Equity Securities (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Accounting Policies [Abstract]    
Gross cash proceeds $ 839,000 $ 1,664,000
Cost 697,000 136,000
Gross gain on sale included in earnings during the period 142,000 1,528,000
Deferred taxes on gross gain on sale included in earnings (58,000) (571,000)
Reclassification adjustment to unrealized gain in other comprehensive income for net gains included in earnings (84,000) (957,000)
Gross unrealized holding loss arising during the period included in other comprehensive loss. (4,081,000) (1,603,000)
Deferred taxes on unrealized holdings loss included in other comprehensive loss 1,582,000 597,000
Valuation allowance on deferred taxes on unrealized holding losses included in other comprehensive loss (871,000)   
Net unrealized holding gain (loss) (3,370,000) (1,006,000)
Other comprehensive income (loss) from marketable equity securities $ (3,454,000) $ (1,963,000)