CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income	$ 12,567	$ 14,865	$ 24,282	$ 25,473
Other comprehensive income, net of tax:
Change in unrealized appreciation of available-for-sale securities, net of tax	1,449	6,707	1,047	5,457
Reclassification adjustment for gains included in net income, net of tax		(717)	(171)	(845)
Other comprehensive income	1,449	5,990	876	4,612
Comprehensive income	$ 14,016	$ 20,855	$ 25,158	$ 30,085