Investment Securities (Aggregate Unrealized Losses and Aggregate Fair Value of Underlying Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Securities [Line Items]
Held-to-maturity Securities, Fair Value, Total	$ 39,756	$ 22,240
Held-to-maturity Securities, Unrealized Losses	(1,491)	(344)
Held-to-maturity Securities, Fair Value Impaired Less Than 12 Months	37,786	12,365
Held-to-maturity Securities, Unrealized Loss Less Than 12 Months	(1,467)	(86)
Held-to-maturity Securities, Fair Value Impaired More Than 12 Months	1,970	9,875
Held-to-maturity Securities, Unrealized Loss More Than 12 Months	(24)	(258)
Available-for-sale Securities, Fair Value, Total	86,544	138,977
Available-for-sale Securities, Unrealized Loss, Total	(1,687)	(1,376)
Available-for-sale Securities, Fair Value Impaired Less Than 12 Months	73,858	119,196
Available-for-sale Securities, Unrealized Loss Less Than 12 Months	(1,313)	(806)
Available-for-sale Securities, Fair Value Impaired More Than 12 Months	12,686	19,781
Available-for-sale Securities, Unrealized Loss More Than 12 Months	(374)	(570)
US Government Agency Obligations [Member]
Securities [Line Items]
Available-for-sale Securities, Fair Value, Total	27,270	58,208
Available-for-sale Securities, Unrealized Loss, Total	(150)	(252)
Available-for-sale Securities, Fair Value Impaired Less Than 12 Months	27,270	58,208
Available-for-sale Securities, Unrealized Loss Less Than 12 Months	(150)	(252)
Government Sponsored Entities (GSE) Mortgage-Backed Securities [Member]
Securities [Line Items]
Available-for-sale Securities, Fair Value, Total	29,145	38,307
Available-for-sale Securities, Unrealized Loss, Total	(723)	(325)
Available-for-sale Securities, Fair Value Impaired Less Than 12 Months	29,145	33,984
Available-for-sale Securities, Unrealized Loss Less Than 12 Months	(723)	(238)
Available-for-sale Securities, Fair Value Impaired More Than 12 Months		4,323
Available-for-sale Securities, Unrealized Loss More Than 12 Months		(87)
Collateralized Mortgage Obligations GSE [Member]
Securities [Line Items]
Held-to-maturity Securities, Fair Value, Total	1,104	1,482
Held-to-maturity Securities, Unrealized Losses	(22)	(26)
Held-to-maturity Securities, Fair Value Impaired Less Than 12 Months	1,104	388
Held-to-maturity Securities, Unrealized Loss Less Than 12 Months	(22)	(10)
Held-to-maturity Securities, Fair Value Impaired More Than 12 Months		1,094
Held-to-maturity Securities, Unrealized Loss More Than 12 Months		(16)
Available-for-sale Securities, Fair Value, Total	12,116	15,231
Available-for-sale Securities, Unrealized Loss, Total	(387)	(438)
Available-for-sale Securities, Fair Value Impaired Less Than 12 Months	4,868	4,187
Available-for-sale Securities, Unrealized Loss Less Than 12 Months	(94)	(41)
Available-for-sale Securities, Fair Value Impaired More Than 12 Months	7,248	11,044
Available-for-sale Securities, Unrealized Loss More Than 12 Months	(293)	(397)
Corporate Bonds [Member]
Securities [Line Items]
Held-to-maturity Securities, Fair Value, Total	5,962	7,597
Held-to-maturity Securities, Unrealized Losses	(63)	(42)
Held-to-maturity Securities, Fair Value Impaired Less Than 12 Months	3,992	7,597
Held-to-maturity Securities, Unrealized Loss Less Than 12 Months	(39)	(42)
Held-to-maturity Securities, Fair Value Impaired More Than 12 Months	1,970
Held-to-maturity Securities, Unrealized Loss More Than 12 Months	(24)
Available-for-sale Securities, Fair Value, Total	13,031	20,571
Available-for-sale Securities, Unrealized Loss, Total	(299)	(350)
Available-for-sale Securities, Fair Value Impaired Less Than 12 Months	7,593	16,157
Available-for-sale Securities, Unrealized Loss Less Than 12 Months	(218)	(264)
Available-for-sale Securities, Fair Value Impaired More Than 12 Months	5,438	4,414
Available-for-sale Securities, Unrealized Loss More Than 12 Months	(81)	(86)
State and Municipal Tax-Exempt [Member]
Securities [Line Items]
Held-to-maturity Securities, Fair Value, Total	32,690	13,161
Held-to-maturity Securities, Unrealized Losses	(1,406)	(276)
Held-to-maturity Securities, Fair Value Impaired Less Than 12 Months	32,690	4,380
Held-to-maturity Securities, Unrealized Loss Less Than 12 Months	(1,406)	(34)
Held-to-maturity Securities, Fair Value Impaired More Than 12 Months		8,781
Held-to-maturity Securities, Unrealized Loss More Than 12 Months		(242)
Available-for-sale Securities, Fair Value, Total	4,956	6,660
Available-for-sale Securities, Unrealized Loss, Total	(128)	(11)
Available-for-sale Securities, Fair Value Impaired Less Than 12 Months	4,956	6,660
Available-for-sale Securities, Unrealized Loss Less Than 12 Months	(128)	$ (11)
Asset-Backed Security [Member]
Securities [Line Items]
Available-for-sale Securities, Fair Value, Total	26
Available-for-sale Securities, Fair Value Impaired Less Than 12 Months	$ 26