Investment Securities (Unrealized Losses on Available for Sale and Held to Maturity Securities) (Details) $ in Thousands	Jun. 30, 2017 USD ($) security	Dec. 31, 2016 USD ($) security
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities in a continuous unrealized loss position, number | security	83	126
Securities in a continuous unrealized loss position, less than 12 months, fair value	$ 67,731	$ 89,158
Securities in a continuous unrealized loss position, less than 12 months, unrealized losses	(599)	(1,457)
Securities in a continuous unrealized loss position, 12 months or longer, fair value	9,641	9,089
Securities in a continuous unrealized loss position, 12 months or longer, unrealized losses	(229)	(230)
Securities in a continuous unrealized loss position, fair value	77,372	98,247
Securities in a continuous unrealized loss position, unrealized losses	$ (828)	$ (1,687)
U. S. Treasury securities and obligations of U.S. Government sponsored corporations (“GSE”) and agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities in a continuous unrealized loss position, number | security	3	3
Securities in a continuous unrealized loss position, less than 12 months, fair value	$ 6,881	$ 7,090
Securities in a continuous unrealized loss position, less than 12 months, unrealized losses	(77)	(151)
Securities in a continuous unrealized loss position, 12 months or longer, fair value	0	0
Securities in a continuous unrealized loss position, 12 months or longer, unrealized losses	0	0
Securities in a continuous unrealized loss position, fair value	6,881	7,090
Securities in a continuous unrealized loss position, unrealized losses	$ (77)	$ (151)
Residential collateralized mortgage obligations - GSE [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities in a continuous unrealized loss position, number | security	8	7
Securities in a continuous unrealized loss position, less than 12 months, fair value	$ 17,025	$ 17,242
Securities in a continuous unrealized loss position, less than 12 months, unrealized losses	(201)	(275)
Securities in a continuous unrealized loss position, 12 months or longer, fair value	1,646	0
Securities in a continuous unrealized loss position, 12 months or longer, unrealized losses	(23)	0
Securities in a continuous unrealized loss position, fair value	18,671	17,242
Securities in a continuous unrealized loss position, unrealized losses	$ (224)	$ (275)
Residential mortgage backed securities - GSE [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities in a continuous unrealized loss position, number | security	30	29
Securities in a continuous unrealized loss position, less than 12 months, fair value	$ 25,807	$ 26,581
Securities in a continuous unrealized loss position, less than 12 months, unrealized losses	(133)	(216)
Securities in a continuous unrealized loss position, 12 months or longer, fair value	0	3,542
Securities in a continuous unrealized loss position, 12 months or longer, unrealized losses	0	(16)
Securities in a continuous unrealized loss position, fair value	25,807	30,123
Securities in a continuous unrealized loss position, unrealized losses	$ (133)	$ (232)
Obligations of state and political subdivisions [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities in a continuous unrealized loss position, number | security	32	74
Securities in a continuous unrealized loss position, less than 12 months, fair value	$ 12,224	$ 25,545
Securities in a continuous unrealized loss position, less than 12 months, unrealized losses	(124)	(611)
Securities in a continuous unrealized loss position, 12 months or longer, fair value	0	0
Securities in a continuous unrealized loss position, 12 months or longer, unrealized losses	0	0
Securities in a continuous unrealized loss position, fair value	12,224	25,545
Securities in a continuous unrealized loss position, unrealized losses	$ (124)	$ (611)
Trust preferred debt securities – single issuer [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities in a continuous unrealized loss position, number | security	4	4
Securities in a continuous unrealized loss position, less than 12 months, fair value	$ 0	$ 0
Securities in a continuous unrealized loss position, less than 12 months, unrealized losses	0	0
Securities in a continuous unrealized loss position, 12 months or longer, fair value	2,366	2,272
Securities in a continuous unrealized loss position, 12 months or longer, unrealized losses	(114)	(206)
Securities in a continuous unrealized loss position, fair value	2,366	2,272
Securities in a continuous unrealized loss position, unrealized losses	$ (114)	$ (206)
Corporate debt securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities in a continuous unrealized loss position, number | security	3	6
Securities in a continuous unrealized loss position, less than 12 months, fair value	$ 2,786	$ 12,700
Securities in a continuous unrealized loss position, less than 12 months, unrealized losses	(57)	(204)
Securities in a continuous unrealized loss position, 12 months or longer, fair value	4,910	1,999
Securities in a continuous unrealized loss position, 12 months or longer, unrealized losses	(90)	(1)
Securities in a continuous unrealized loss position, fair value	7,696	14,699
Securities in a continuous unrealized loss position, unrealized losses	$ (147)	$ (205)
Other debt securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities in a continuous unrealized loss position, number | security	3	3
Securities in a continuous unrealized loss position, less than 12 months, fair value	$ 3,008	$ 0
Securities in a continuous unrealized loss position, less than 12 months, unrealized losses	(7)	0
Securities in a continuous unrealized loss position, 12 months or longer, fair value	719	1,276
Securities in a continuous unrealized loss position, 12 months or longer, unrealized losses	(2)	(7)
Securities in a continuous unrealized loss position, fair value	3,727	1,276
Securities in a continuous unrealized loss position, unrealized losses	$ (9)	$ (7)