Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income	$ 30,622	$ 75,020	$ 54,084
Net unrealized gains on investment securities available for sale:
Change in net unrealized (losses) gains	(13,267)	23,573	45,908
Net unrealized gains reclassified into net income	(1,640)	(23,257)	(19,869)
Net unrealized (losses) gains on investment securities available for sale	(14,907)	316	26,039
Net unrealized gains (losses) on long-term investments accounted for under the equity method	1,353	(3,596)	1,115
Net change in forward contracts	64	65	72
Net change in pension-related amounts	2,394	(10,399)	4,522
Other comprehensive (loss) income	(11,096)	(13,614)	31,748
Income tax effect on:
Change in net unrealized gains (losses) on investment securities	5,387	(9,789)	(18,301)
Net unrealized gains reclassified into net income on investment securities	665	9,442	7,948
Change in unrealized long-term investments	(549)	1,453	(446)
Forward contracts	(26)	(26)	(30)
Pension-related amounts	(972)	4,401	(1,584)
Income tax benefit (provision) on other comprehensive income (loss)	4,505	5,481	(12,413)
Other comprehensive (loss) income, net of tax	(6,591)	(8,133)	19,335
Comprehensive income	$ 24,031	$ 66,887	$ 73,419