Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income (loss)	$ 3,895	$ 30,301	$ (3,795)	$ 49,674
Net unrealized gains on investment securities available for sale:
Change in net unrealized gains	(3,025)	(950)	(14,269)	3,420
Net unrealized (gains) reclassified into net income	0	(1,506)	0	(14,541)
Net unrealized gains on investment securities available for sale	(3,025)	(2,456)	(14,269)	(11,121)
Net unrealized (losses) gains on long-term investments accounted for under the equity method	(2,505)	(1,885)	542	(1,453)
Net change in forward contracts	17	15	32	31
Net change in pension-related amounts	871	679	1,741	1,360
Other comprehensive loss	(4,642)	(3,647)	(11,954)	(11,183)
Income tax effect on change in net unrealized gains on investment securities	1,228	380	5,793	(1,368)
Income tax effect on net unrealized gains reclassified into net income on investment securities	0	602	0	5,816
Income tax effect on change in unrealized long-term investments	1,017	756	(220)	583
Income tax effect on forward contracts	(7)	(6)	(13)	(14)
Income tax effect on pension-related amounts	(354)	(272)	(707)	(544)
Income taxes benefit on other comprehensive loss	1,884	1,460	4,853	4,473
Other comprehensive loss, net of tax	(2,758)	(2,187)	(7,101)	(6,710)
Total comprehensive income (loss)	$ 1,137	$ 28,114	$ (10,896)	$ 42,964