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Employee Benefit Plans (Other Changes In Other Comprehensive Income (Loss)) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Pension Plans [Member]
   
Defined Benefit Plan Disclosure [Line Items]    
Other comprehensive income (loss) at December 31, prior year $ (78,923) $ (36,436)
Net gain (loss) arising during period (13,961) (47,177)
Prior service cost 49 49
Actuarial loss (gain) 6,896 4,641
Other comprehensive income (loss) at December 31, current year (85,939) (78,923)
Post-Retirement Plan [Member]
   
Defined Benefit Plan Disclosure [Line Items]    
Other comprehensive income (loss) at December 31, prior year (6,516) (3,692)
Net gain (loss) arising during period (4,147) (2,983)
Actuarial loss (gain) 432 159
Other comprehensive income (loss) at December 31, current year $ (10,231) $ (6,516)