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Pension and Other Postretirement Benefits Changes in Plan Assets & Benefit Obligation Recognized in OCI (pre-taxed) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Net loss (gain) $ (56,795) $ 16,691 $ 62,212
Amortization of prior service benefit (cost) 3,920 4,113 32,677
Other Postretirement Benefit Plans, Defined Benefit [Member]
      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Net loss (gain) (24,171) 11,725  
Amortization of net loss (5,022) (6,195)  
Amortization of prior service benefit (cost) 4,015 4,250  
Total amount recognized in other comprehensive loss (25,178) 9,780  
Net periodic benefit cost 9,215 9,247 (10,355)
Total recognized in net periodic benefit cost and other comprehensive loss (15,963) 19,027  
Pension Plans, Defined Benefit [Member]
      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Net loss (gain) (32,624) 4,966  
Amortization of net loss (3,152) (3,642)  
Amortization of prior service benefit (cost) (95) (137)  
Total amount recognized in other comprehensive loss (35,871) 1,187  
Net periodic benefit cost 6,298 6,490 6,625
Total recognized in net periodic benefit cost and other comprehensive loss $ (29,573) $ 7,677