Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net income	$ 13,803	$ 7,987
Unrealized gains on available-for-sale securities arising during the period	1,313	228
Reclassification adjustment for gains	(83)	(84)
Other comprehensive income before income taxes	1,230	144
Tax effect	(454)	(53)
Other comprehensive income, net of tax	776	91
Comprehensive income, net of tax	$ 14,579	$ 8,078