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Summary Of Significant Accounting Policies (Amounts Included In Accumulated Other Comprehensive Loss) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Balance, Beginning $ (35,058) [1] $ (47,201) [1] $ (11,096) [1]
Net gain (loss) on cash flow hedges(1) (4,744) [1],[2] 13,889 [1],[2] 7,739 [1],[2]
Reclassification of net loss (gain) on cash flow hedges to income(1) 4,245 [1],[2] (2,924) [1],[2] (7,903) [1],[2]
Net actuarial loss(2) 14,089 [1],[3] (17,804) [1],[3] (37,058) [1],[3]
Plan amendment 0 [3] 16,020 [1],[3] 0 [3]
Amortization of actuarial loss(2) 5,369 [1],[3] 4,626 [1],[3] 1,591 [1],[3]
Amortization of prior service credit(2) (3,405) [1],[3] (1,664) [1],[3] (544) [1],[3]
Settlement cost(2) 0 [3] 0 [3] 70 [1],[3]
Balance, Ending (19,504) [1] (35,058) [1] (47,201) [1]
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Balance, Beginning 14,126 3,161 3,325
Net gain (loss) on cash flow hedges(1) (4,744) [4] 13,889 [4] 7,739 [4]
Reclassification of net loss (gain) on cash flow hedges to income(1) 4,245 [4] (2,924) [4] (7,903) [4]
Balance, Ending 13,627 14,126 3,161
Accumulated Defined Benefit Plans Adjustment [Member]
      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Balance, Beginning (49,184) (50,362) (14,421)
Net actuarial loss(2) 14,089 [5] (17,804) [5] (37,058) [5]
Plan amendment   16,020 [5]  
Amortization of actuarial loss(2) 5,369 [5] 4,626 [5] 1,591 [5]
Amortization of prior service credit(2) (3,405) [5] (1,664) [5] (544) [5]
Settlement cost(2)     70 [5]
Balance, Ending $ (33,131) $ (49,184) $ (50,362)
[1] Includes amounts allocated to the non-controlling owners' interest.
[2] (1) See Note 13–Derivative Financial Instruments for details of the amount of gain/loss recognized in AOCL on derivatives and the amount of gain/loss reclassified from AOCL into income.
[3] (2) See Note 10–Employee Benefit Plans for additional detail of the changes in employee benefit plan assets and benefit obligations that are recognized in other comprehensive income (loss).
[4] See Note 13–Derivative Financial Instruments for additional detail of the amount of gain (loss) recognized in AOCL on derivatives and the amount of (gain) loss reclassified from AOCL into income.
[5] See Note 10–Employee Benefit Plans for additional detail of the changes in employee benefit plan assets and benefit obligations that are recognized in other comprehensive income (loss).