Investment Securities (Schedule of Fair Value and Unrealized Loss on Investments in a Continuous Unrealized Loss Position) (Details) $ in Thousands	Dec. 31, 2016 USD ($) security	Dec. 31, 2015 USD ($) security
Schedule of Investments [Line Items]
Less than 12 Months: Number of Securities | security	149	29
Less than 12 Months: Fair Value	$ 118,601	$ 24,049
Less than 12 Months: Unrealized Losses	$ 4,453	$ 209
12 Months or More: Number of Securities | security	2	18
12 Months or More: Fair Value	$ 1,056	$ 9,911
12 Months or More: Unrealized Losses	$ 112	$ 194
Total: Number of Securities | security	151	47
Total: Fair Value	$ 119,657	$ 33,960
Total: Unrealized Losses	$ 4,565	$ 403
U.S. Treasury and U.S. government agencies [Member]
Schedule of Investments [Line Items]
Less than 12 Months: Number of Securities | security	23	6
Less than 12 Months: Fair Value	$ 43,698	$ 6,259
Less than 12 Months: Unrealized Losses	$ 1,542	$ 43
12 Months or More: Number of Securities | security	0	2
12 Months or More: Fair Value		$ 1,383
12 Months or More: Unrealized Losses		$ 12
Total: Number of Securities | security	23	8
Total: Fair Value	$ 43,698	$ 7,642
Total: Unrealized Losses	$ 1,542	$ 55
Mortgage-backed U.S. Government Agencies [Member]
Schedule of Investments [Line Items]
Less than 12 Months: Number of Securities | security	18	13
Less than 12 Months: Fair Value	$ 24,321	$ 12,759
Less than 12 Months: Unrealized Losses	$ 579	$ 124
12 Months or More: Number of Securities | security	0	11
12 Months or More: Fair Value		$ 6,282
12 Months or More: Unrealized Losses		$ 104
Total: Number of Securities | security	18	24
Total: Fair Value	$ 24,321	$ 19,041
Total: Unrealized Losses	$ 579	$ 228
State and political subdivision obligations [Member]
Schedule of Investments [Line Items]
Less than 12 Months: Number of Securities | security	108	9
Less than 12 Months: Fair Value	$ 50,582	$ 4,041
Less than 12 Months: Unrealized Losses	$ 2,332	$ 32
12 Months or More: Number of Securities | security	0	3
12 Months or More: Fair Value		$ 1,631
12 Months or More: Unrealized Losses		$ 45
Total: Number of Securities | security	108	12
Total: Fair Value	$ 50,582	$ 5,672
Total: Unrealized Losses	$ 2,332	$ 77
Corporate debt securities [Member]
Schedule of Investments [Line Items]
Less than 12 Months: Number of Securities | security		1
Less than 12 Months: Fair Value		$ 990
Less than 12 Months: Unrealized Losses		$ 10
12 Months or More: Number of Securities | security		0
Total: Number of Securities | security		1
Total: Fair Value		$ 990
Total: Unrealized Losses		$ 10
Equity Securities [Member]
Schedule of Investments [Line Items]
Less than 12 Months: Number of Securities | security	0	0
12 Months or More: Number of Securities | security	2	2
12 Months or More: Fair Value	$ 1,056	$ 615
12 Months or More: Unrealized Losses	$ 112	$ 33
Total: Number of Securities | security	2	2
Total: Fair Value	$ 1,056	$ 615
Total: Unrealized Losses	$ 112	$ 33