Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Unrealized gain (loss) on securities, tax expense (benefit)	$ (27)	$ 100	$ (125)	$ 386
Accretion of unrealized loss on securities reclassified to held-to-maturity, tax expense	$ 152	142	$ 415	375
Reclassification adjustment for gains included in net income, tax expense		$ 241		$ 383