v2.4.0.8
Employee Benefit Plans (Changes In Benefit Obligations And Plan Assets) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Change in plan assets:      
Beginning balance $ 87,106    
Employer contributions 15,500 13,300  
Fair value of plan assets at end of year 100,556 87,106  
Pension Benefits [Member]
      
Change in benefit obligation:      
Benefit obligation at beginning of year 142,703 113,914  
Service cost 13,901 12,222 9,628
Interest cost 5,368 4,862 4,343
Plan participants’ contributions 0 0  
Actuarial loss (14,121) 15,975  
Benefits paid (5,541) (4,270)  
Plan amendment 0 0  
Benefit obligation at end of year 142,310 142,703 113,914
Change in plan assets:      
Beginning balance 87,106 70,052  
Employer contributions 15,470 13,336  
Plan participants’ contributions 0 0  
Actual return on plan assets 3,521 7,988  
Benefits paid (5,541) (4,270)  
Fair value of plan assets at end of year 100,556 87,106 70,052
Funded status at end of year (41,754) (55,597)  
Accumulated benefit obligation 103,466 101,233  
Other Postretirement Benefits [Member]
      
Change in benefit obligation:      
Benefit obligation at beginning of year 13,195 23,786  
Service cost 288 396 430
Interest cost 412 821 999
Plan participants’ contributions 248 221  
Actuarial loss (2,675) 4,751  
Benefits paid (1,050) (760)  
Plan amendment 0 (16,020)  
Benefit obligation at end of year 10,418 13,195 23,786
Change in plan assets:      
Beginning balance 0 0  
Employer contributions 802 539  
Plan participants’ contributions 248 221  
Actual return on plan assets 0 0  
Benefits paid (1,050) (760)  
Fair value of plan assets at end of year 0 0 0
Funded status at end of year $ (10,418) $ (13,195)