Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income	$ 13,975	$ 10,607	$ 34,969	$ 28,049
Unrealized gains (losses) on available-for-sale securities arising during the period	(1,004)	3,847	(7,438)	6,637
Reclassification adjustment for (gains)	0	(458)	(93)	(954)
Other comprehensive income (loss) before income taxes	(1,004)	3,389	(7,531)	5,683
Tax effect	371	(1,277)	2,779	(2,141)
Other comprehensive income (loss), net of tax	(633)	2,112	(4,752)	3,542
Comprehensive income, net of tax	$ 13,342	$ 12,719	$ 30,217	$ 31,591