Investment Securities (Details) - Unrealized gains on investment securities - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	$ 419,947	$ 436,868
Investment Securities Available-for-Sale, Gross Unrealized Gains	1,297	2,886
Investment Securities Available-for-Sale, Gross Unrealized Losses	(9,210)	(4,470)
Investment Securities Available-for-Sale, Fair Value	412,034	435,284
Federal Agency Obligations [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	45,509	56,297
Investment Securities Available-for-Sale, Gross Unrealized Gains	51	141
Investment Securities Available-for-Sale, Gross Unrealized Losses	(605)	(416)
Investment Securities Available-for-Sale, Fair Value	44,955	56,022
Residential Mortgage Backed Securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	189,721	183,509
Investment Securities Available-for-Sale, Gross Unrealized Gains	85	330
Investment Securities Available-for-Sale, Gross Unrealized Losses	(4,602)	(1,948)
Investment Securities Available-for-Sale, Fair Value	185,204	181,891
Commercial Mortgage Backed Securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	3,919	4,054
Investment Securities Available-for-Sale, Gross Unrealized Gains		3
Investment Securities Available-for-Sale, Gross Unrealized Losses	(45)	(3)
Investment Securities Available-for-Sale, Fair Value	3,874	4,054
US States and Political Subdivisions Debt Securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	141,496	130,723
Investment Securities Available-for-Sale, Gross Unrealized Gains	1,091	1,739
Investment Securities Available-for-Sale, Gross Unrealized Losses	(3,402)	(1,334)
Investment Securities Available-for-Sale, Fair Value	139,185	131,128
Trust Preferred Securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost		4,577
Investment Securities Available-for-Sale, Gross Unrealized Gains		205
Investment Securities Available-for-Sale, Gross Unrealized Losses		(111)
Investment Securities Available-for-Sale, Fair Value		4,671
Corporate Bonds And Notes [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	26,308	29,801
Investment Securities Available-for-Sale, Gross Unrealized Gains	45	163
Investment Securities Available-for-Sale, Gross Unrealized Losses	(540)	(271)
Investment Securities Available-for-Sale, Fair Value	25,813	29,693
Asset-backed Securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	9,685	12,021
Investment Securities Available-for-Sale, Gross Unrealized Gains	22	66
Investment Securities Available-for-Sale, Gross Unrealized Losses	(16)	(37)
Investment Securities Available-for-Sale, Fair Value	9,691	12,050
Certificates of Deposit [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	319	621
Investment Securities Available-for-Sale, Gross Unrealized Gains	3	4
Investment Securities Available-for-Sale, Gross Unrealized Losses
Investment Securities Available-for-Sale, Fair Value	322	625
Equity Securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost		11,843
Investment Securities Available-for-Sale, Gross Unrealized Gains		235
Investment Securities Available-for-Sale, Gross Unrealized Losses		(350)
Investment Securities Available-for-Sale, Fair Value	11,460	11,728
Other Securities [Member]
Investment securities available-for-sale
Investment Securities Available-for-Sale, Amortized Cost	2,990	3,422
Investment Securities Available-for-Sale, Gross Unrealized Gains
Investment Securities Available-for-Sale, Gross Unrealized Losses
Investment Securities Available-for-Sale, Fair Value	$ 2,990	$ 3,422