Accumulated Other Comprehensive Income/(Loss) (Other - Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncome [Line Items]
Total employee benefit amounts reclassified from accumulated other comprehensive income/(loss), net	$ (41,698)	$ 1,752	$ 573,635	$ 3,500
Minimum
ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncome [Line Items]
Remaining unrecognized loss to be amortized, amortization period			1 year 6 months
Remaining net prior service credit to be amortized, amortization period			1 year 8 months 19 days
Maximum
ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncome [Line Items]
Remaining unrecognized loss to be amortized, amortization period			12 years 1 month 6 days
Remaining net prior service credit to be amortized, amortization period			24 years 10 months 24 days
Reclassification out of Accumulated Other Comprehensive Income
ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncome [Line Items]
Amortization of actuarial loss	34,345		$ 85,960
Amortization of prior service credit	(90,413)		(217,146)
Plan settlement	16,151		16,149
Plan curtailment	(1,781)		(1,781)
Total employee benefit amounts reclassified from accumulated other comprehensive income/(loss)	(41,698)		(116,818)
Tax benefit	0		0
Total employee benefit amounts reclassified from accumulated other comprehensive income/(loss), net	$ 41,698		$ 116,818