Statement Changes Stockholder Equity Parentheticals (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Unrealized foreign currency translation adjustment, tax	$ 0	$ 1,737	$ 2,491
Foreign currency translation reclassification adjustment for net gains included in net loss, tax	11,367	280	0
Net foreign currency translation adjustment, tax	11,367	1,457	2,491
Unrealized holding gains arising during period, tax	0	22,165	107,511
Reclassification adjustment for net gains included in net loss, tax	15,520	2,036	29,363
Net unrealized gain on investments, tax	$ 15,520	$ 24,201	$ 78,148