Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statements Of Comprehensive Income [Abstract]
Net income	$ 12,618	$ 12,125	$ 15,131
Other comprehensive (loss) income, net of tax:
Unrealized holding gain (losses) on securities available for sale, net of taxes of $(704), $921 and $(3,398)	(1,308)	1,705	(6,311)
Unrealized holding gains (losses) arising during the period for securities transferred from available for sale to held to maturity, net of taxes of $0, $4 and $(1,902)		8	(3,533)
Amortization of unrealized holding losses of securities transferred from available for sale to held to maturity, net of taxes of 279, $254 and $128	519	472	237
Reclassification adjustments for net securities losses (gains) included in net income, net of taxes of $0, $(38) and $62		(69)	116
Change in net unrealized loss on interest rate swaps, net of taxes of $84, $86 and $116	156	161	216
Pension liability adjustment, net of taxes of $(184), $(863) and $721	(342)	(1,605)	1,340
Other comprehensive (loss) income	(975)	672	(7,935)
Comprehensive (loss) income	$ 11,643	$ 12,797	$ 7,196