Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Net Income	$ 14,221	$ 12,300
Other comprehensive income, before tax expense:
Unrealized holding gains on securities arising during the period	9,980	12,457
Less: reclassification adjustment for gains on securities included in net income	(105)	0
Unrealized holding gains on derivatives arising during the period	1,195	0
Less: reclassification adjustment for losses on derivatives included in net income	5	0
Total other comprehensive income, before tax expense	11,075	12,457
Income tax expense related to items of other comprehensive income	(3,874)	(4,361)
Total other comprehensive income	7,201	8,096
Comprehensive Income	$ 21,422	$ 20,396