Consolidated Statements of Comprehensive Income (Parentheticals) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Consolidated Statements of Comprehensive Income
Tax (benefit) expense on unrealized holding (losses) gains during the period	$ (10,082)	$ 1,214	$ (12,470)	$ 2,077
Tax expense on reclassification adjustment for gains included in net income	$ (49)	$ (216)	$ (190)	$ (376)