Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net income (loss)	$ 36,563	$ (9,684)	$ (25,750)
Unrealized holding gains:
Before tax	34,303	1,067	2,556
Tax effect	(13,427)	(406)	(986)
Net of tax	20,876	661	1,570
Reclassification of net gains included in net income:
Before tax	2,410	12,216	2,110
Tax effect	(986)	(4,764)	(824)
Net of tax	1,424	7,452	1,286
Net unrealized holding gains (losses)	19,452	(6,791)	284
Unrealized holding (losses) gains:
Before tax	(8,860)	(3,740)	16,988
Tax effect	3,871	1,458	(6,625)
Net of tax	(4,989)	(2,282)	10,363
Total other comprehensive income (loss)	14,463	(9,073)	10,647
Comprehensive income (loss)	$ 51,026	$ (18,757)	$ (15,103)