Investment Securities (Unrealized Losses on Available for Sale and Held to Maturity Securities) (Details) $ in Thousands	Sep. 30, 2020 USD ($) security	Dec. 31, 2019 USD ($) security
Debt and Equity Securities, FV-NI [Line Items]
Securities in a continuous unrealized loss position, number | security	28	75
Securities in a continuous unrealized loss position, less than 12 months, fair value	$ 14,510	$ 43,594
Securities in a continuous unrealized loss position, less than 12 months, unrealized losses	(79)	(388)
Securities in a continuous unrealized loss position, 12 months or longer, fair value	32,768	28,821
Securities in a continuous unrealized loss position, 12 months or longer, unrealized losses	(541)	(368)
Securities in a continuous unrealized loss position, fair value	47,278	72,415
Securities in a continuous unrealized loss position, unrealized losses	$ (620)	$ (756)
U.S. Treasury securities and obligations of U.S. Government sponsored entities (GSE) and agencies
Debt and Equity Securities, FV-NI [Line Items]
Securities in a continuous unrealized loss position, number | security	1	1
Securities in a continuous unrealized loss position, less than 12 months, fair value	$ 588	$ 764
Securities in a continuous unrealized loss position, less than 12 months, unrealized losses	(6)	(10)
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	588	764
Securities in a continuous unrealized loss position, unrealized losses	$ (6)	$ (10)
Residential collateralized mortgage obligations - GSE
Debt and Equity Securities, FV-NI [Line Items]
Securities in a continuous unrealized loss position, number | security	7	39
Securities in a continuous unrealized loss position, less than 12 months, fair value	$ 7,948	$ 18,328
Securities in a continuous unrealized loss position, less than 12 months, unrealized losses	(37)	(138)
Securities in a continuous unrealized loss position, 12 months or longer, fair value	11,610	13,300
Securities in a continuous unrealized loss position, 12 months or longer, unrealized losses	(122)	(139)
Securities in a continuous unrealized loss position, fair value	19,558	31,628
Securities in a continuous unrealized loss position, unrealized losses	$ (159)	$ (277)
Residential mortgage backed securities - GSE
Debt and Equity Securities, FV-NI [Line Items]
Securities in a continuous unrealized loss position, number | security	3	13
Securities in a continuous unrealized loss position, less than 12 months, fair value	$ 212	$ 5,505
Securities in a continuous unrealized loss position, less than 12 months, unrealized losses	(7)	(59)
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	212	5,505
Securities in a continuous unrealized loss position, unrealized losses	$ (7)	$ (59)
Obligations of state and political subdivisions
Debt and Equity Securities, FV-NI [Line Items]
Securities in a continuous unrealized loss position, number | security	3	4
Securities in a continuous unrealized loss position, less than 12 months, fair value	$ 2,782	$ 2,311
Securities in a continuous unrealized loss position, less than 12 months, unrealized losses	(10)	(25)
Securities in a continuous unrealized loss position, 12 months or longer, fair value	0	527
Securities in a continuous unrealized loss position, 12 months or longer, unrealized losses	0	0
Securities in a continuous unrealized loss position, fair value	2,782	2,838
Securities in a continuous unrealized loss position, unrealized losses	$ (10)	$ (25)
Trust preferred debt securities - single issuer
Debt and Equity Securities, FV-NI [Line Items]
Securities in a continuous unrealized loss position, number | security	2	2
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	1,389	1,442
Securities in a continuous unrealized loss position, 12 months or longer, unrealized losses	(105)	(50)
Securities in a continuous unrealized loss position, fair value	1,389	1,442
Securities in a continuous unrealized loss position, unrealized losses	$ (105)	$ (50)
Corporate debt securities
Debt and Equity Securities, FV-NI [Line Items]
Securities in a continuous unrealized loss position, number | security	3	4
Securities in a continuous unrealized loss position, less than 12 months, fair value	$ 2,980	$ 2,994
Securities in a continuous unrealized loss position, less than 12 months, unrealized losses	(19)	(5)
Securities in a continuous unrealized loss position, 12 months or longer, fair value	4,947	7,954
Securities in a continuous unrealized loss position, 12 months or longer, unrealized losses	(53)	(79)
Securities in a continuous unrealized loss position, fair value	7,927	10,948
Securities in a continuous unrealized loss position, unrealized losses	$ (72)	$ (84)
Other debt securities
Debt and Equity Securities, FV-NI [Line Items]
Securities in a continuous unrealized loss position, number | security	9	12
Securities in a continuous unrealized loss position, less than 12 months, fair value	$ 0	$ 13,692
Securities in a continuous unrealized loss position, less than 12 months, unrealized losses	0	(151)
Securities in a continuous unrealized loss position, 12 months or longer, fair value	14,822	5,598
Securities in a continuous unrealized loss position, 12 months or longer, unrealized losses	(261)	(100)
Securities in a continuous unrealized loss position, fair value	14,822	19,290
Securities in a continuous unrealized loss position, unrealized losses	$ (261)	$ (251)