Condensed Consolidated Statements Of Comprehensive Income (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Statement of Other Comprehensive Income [Abstract]
Net income (loss)	$ (66,754)	$ (28,826)	$ (72,388)	$ 73,151
Other comprehensive income (loss), net of tax where applicable:
Unrealized foreign currency translation gains (losses)	(242)	685	114	(200)
Change in fair value of available-for-sale investment	1,405	(584)	2,883	(321)
Unrealized gains (losses) on derivatives for the period	(1,371)	(22,947)	(5,772)	20,493
Gains reclassified from OCI into net income	(3,069)	(11,568)	(17,103)	(30,029)
Unrealized gains (losses) on derivatives	(4,440)	(34,515)	(22,875)	(9,536)
Actuarial gains for the period	0	20	296	4,960
Amortization included in penison cost, net of ($18), $0, ($293) and $0, respectively, of income tax expense (benefit)	292	230	1,098	693
Defined benefit pension and severance plans	292	250	1,394	5,653
Other comprehensive income (loss), net of tax	(2,985)	(34,164)	(18,484)	(4,404)
Comprehensive income (loss)	$ (69,739)	$ (62,990)	$ (90,872)	$ 68,747