Condensed Consolidated Statements Of Comprehensive Income (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net income (loss)	$ (11,142)	$ 24,202
Other comprehensive income (loss), net of tax:
Unrealized foreign currency translation losses	(137)	(695)
Change in fair value of available-for-sale investment	490	258
Unrealized gains on derivatives for the period	17,789	38,045
Gains reclassified from OCI into net income	(9,895)	(5,410)
Unrealized gains on derivatives	7,894	32,635
Actuarial gains for the period	111	4,902
Amortization included in penison cost, net of ($281) and $0 of income tax expense (benefit)	546	250
Defined benefit pension and severance plans	657	5,152
Other comprehensive income (loss), net of tax	8,904	37,350
Comprehensive income (loss)	$ (2,238)	$ 61,552