Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Securities transactions accumulated other comprehensive income reclassifications	$ 0	$ (142)	$ 0	$ (142)
Unrealized (losses)/gains on securities, tax	179	(280)	653	(167)
Reclassification adjustment for losses included in net income, tax	0	(55)	0	(55)
Other comprehensive (losses)/gains, tax	$ 179	$ (335)	$ 448	$ (222)