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Benefit Plans And Obligations For Termination Indemnity (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]      
Eligibility age for normal retirement benefit plan, in years 65 years    
Lump sum based on employee contribution percentage to certain breakpoint 2.00%    
Additional percentage exceeding the breakpoint 6.00%    
Maximum percentage of pensionable salary 5.00%    
Maximum employer contributions, in years 40 years    
Expected benefit payments, 2014 $ 4,736,000    
Expected benefit payments, 2015 5,371,000    
Expected benefit payments, 2016 5,961,000    
Expected benefit payments, 2017 6,641,000    
Expected benefit payments, 2018 7,477,000    
Total expense 4,712,000 4,436,000 4,356,000
Salary and bonus defer percentage under the plan 100.00%    
Amount on the dollar ESA matches up to 10% of employees total salary 0.50    
ESA offers, maximum percentage 10.00%    
Participant contributions transferred into the plan 880,000 742,000 441,000
ESA contribution to the plan 155,000    
Cash surrender value of the life insurance policies 4,342,000    
Non-qualified defined contribution plan liabilitiy 4,647,000    
Plan assets of life insurance policies, cash surrender 2,585,000    
Related liability, pension payments $ 3,225,000