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Benefit Plans And Obligations For Termination Indemnity (Plans' Funded Status And Amounts Recognized In The Consolidated Financial Statements) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year $ 177,090 $ 153,097  
Service cost 9,368 9,709 8,205
Interest cost 6,830 6,567 6,361
Exchange rate differences 1,060 299  
Actuarial (gain) losses (18,690) 10,747  
Benefits paid (3,277) (3,329)  
Benefit obligation at end of year 172,381 177,090 153,097
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of Plans assets at beginning of year 101,794 81,780  
Actual return on Plans' assets (net of expenses) 9,957 11,002  
Employer contribution 6,768 12,341  
Benefits paid (3,277) (3,329)  
Fair value of Plans' assets at end of year 115,242 101,794 81,780
Funded status (57,140) (75,296)  
Unrecognized net actuarial loss 38,281 63,178  
Unrecognized prior service cost 409 498  
Net accrued benefit cost (18,450) (11,620)  
Accrued benefit liability, current (671) (85)  
Accrued benefit liability, non-current (56,469) (75,211)  
Accumulated other comprehensive income (loss), pre-tax 38,690 63,676  
Net amount recognized (18,450) (11,620)  
Retiree Medical Plan
      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 2,783 3,145  
Service cost 214 299  
Interest cost 88 117  
Actuarial (gain) losses (538) (688)  
Employee Contribution 23 17  
Benefits paid (125) (107)  
Benefit obligation at end of year 2,445 2,783  
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of Plans assets at beginning of year 0    
Employer contribution 102 90  
Employee Contribution 23 17  
Benefits paid (125) (107)  
Fair value of Plans' assets at end of year 0 0  
Funded status (2,445) (2,783)  
Unrecognized net actuarial loss (784) 248  
Unrecognized prior service cost 0 0  
Net accrued benefit cost (3,229) (2,535)  
Accrued benefit liability, current (145) (175)  
Accrued benefit liability, non-current (2,300) (2,608)  
Accumulated other comprehensive income (loss), pre-tax (784) 248  
Net amount recognized $ (3,229) $ (2,535)