CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other comprehensive income (loss), net of tax:
Unrealized holding gains arising during the period, tax	$ 1,091	$ 1,037	$ (1,979)
Reclassification adjustment for gains included in net income, tax	528	48	63
Unrealized gain (loss) on interest rate swap, tax	(34)	3	82
Reclassification adjustment for (gain) loss on interest rate swap ineffectiveness, tax	$ 0	$ 2	$ (2)