Condensed Consolidated Statements of Comprehensive (Loss) Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net (loss) income	$ (169,232)	$ 103,006
Foreign Currency Translation Adjustments:
Unrealized foreign currency translation adjustment, net of tax of $0	0	1,565
Less: Reclassification adjustment for liquidation of foreign subsidiary and net gains on sales, net of tax of $0	0	292
Net foreign currency translation adjustment, net of tax of $0	0	1,857
Unrealized Gain on Investments:
Unrealized holding gains (losses) arising during the period, net of tax of $9,269 and $0	17,214	8,066
Less: Reclassification adjustment for net gains (losses) included in net (loss) income, net of tax of $5,175 and $0	(9,610)	(78)
Net unrealized gain on investments, net of tax of $4,094 and $0	7,604	7,988
Other Comprehensive Income	7,604	9,845
Comprehensive (Loss) Income Net of Tax	$ (161,628)	$ 112,851