CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 7,887	$ 6,433
Unrealized net gains (losses) on securities:
Unrealized net holding gains (losses) arising during period	857	(1,480)
Reclassification adjustment for (gains) included in net income	(43)
Other comprehensive income (loss), before tax	814	(1,480)
Income tax expense (benefit) related to items of other comprehensive income	335	(609)
Other comprehensive income (loss), net of tax	479	(871)
Comprehensive income	$ 8,366	$ 5,562