Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income	$ 9,847	$ 8,326	$ 33,219	$ 20,991
Other comprehensive income, before tax expense:
Unrealized holding gains on securities arising during the period	2,068	4,696	3,165	12,205
Non-credit related gains (losses) on securities not expected to be sold	1,374	(2,535)	1,549	(218)
Less: reclassification adjustment for gains on securities included in net income	(163)	0	(163)	(2,185)
Total other comprehensive income, before tax expense	3,279	2,161	4,551	9,802
Income tax expense related to items of other comprehensive income	1,146	757	1,585	3,431
Comprehensive Income	$ 11,980	$ 9,730	$ 36,185	$ 27,362