Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Tax expense on unrealized holding gain on securities	$ (7,737)	$ 1,571	$ (9,483)	$ 1,237
Tax expense on reclassification adjustment for net gain on securities included in net income	$ (83)	$ (333)	$ (66)	$ (333)