Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net income	$ 12,757	$ 13,006	$ 26,560	$ 20,993
Unrealized gains (losses) on available-for-sale securities arising during the period	3,521	(6,661)	4,834	(6,434)
Reclassification adjustment for gains	(818)	(9)	(901)	(93)
Other comprehensive income (loss) before income taxes	2,703	(6,670)	3,933	(6,527)
Tax effect	(998)	2,462	(1,452)	2,409
Other comprehensive income (loss), net of tax	1,705	(4,208)	2,481	(4,118)
Comprehensive income, net of tax	$ 14,462	$ 8,798	$ 29,041	$ 16,875