CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net income	$ 1,061,034	$ 152,167
Other comprehensive (loss) - derivative instruments:
Unrealized holding (losses) arising during the period	2,814	3,218
Losses reclassified into earnings from other comprehensive income	8,272	3,563
Other comprehensive income - other instruments:
Unrealized holding gains arising during the period	427	(36)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(873)	0
Other comprehensive (loss)	$ 10,640	$ 6,745