Comprehensive Income (Reconciliation Of Net Income (Loss) To Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Comprehensive Income [Abstract]
Net income (loss)	$ 599,114	$ 146,545	$ (55,116)
Foreign currency translation adjustment	(5,616)	9,449	30,932
Unrealized losses on marketable securities	327	(133)
Unrealized net gains (losses) arising during the period			9,760
Less: net losses reclassified into net income			(3,840)
Investment in retained securitization interest			13,600
Unrealized net losses arising during period	(966)	(7,852)	(4,242)
Less: net losses reclassified into net income	(19,185)	(4,880)	(3,003)
Derivative financial instruments	18,219	(2,972)	(1,239)
Marketable securities	460	(133)
Less: net losses reclassified into net income	460	(133)
Amortization of net prior service cost	(564)	925	2,679
Amortization of actuarial loss	23,584	20,944	11,761
Pension and postretirement healthcare funded status adjustment	(146,768)	18,431	37,504
Less: actuarial loss reclassified into net income due to settlement	(173)	(2,942)	(884)
Less: net prior service credit (cost) reclassified into net income (loss) due to curtailment	(1)	1,393	(22,920)
Pension and postretirement healthcare plans	(123,574)	41,849	75,748
Comprehensive income	$ 488,603	$ 194,738	$ 63,925