Investment Securities (Schedule of Fair Value and Unrealized Loss on Investments in a Continuous Unrealized Loss Position) (Details) $ in Thousands	Mar. 31, 2019 USD ($) security	Dec. 31, 2018 USD ($) security
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security	3	16
Available-for-sale securities, Less than 12 Months: Fair Value	$ 4,316	$ 20,487
Available-for-sale securities, Less than 12 Months: Unrealized Losses	$ 14	$ 190
Available-for-sale securities, 12 Months or More: Number of Securities | security	86	91
Available-for-sale securities, 12 Months or More: Fair Value	$ 85,702	$ 84,999
Available-for-sale securities, 12 Months or More: Unrealized Losses	$ 1,858	$ 3,935
Available-for-sale securities, Total: Number of Securities | security	89	107
Available-for-sale securities, Total: Fair Value	$ 90,018	$ 105,486
Available-for-sale securities, Total: Unrealized Losses	$ 1,872	$ 4,125
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	2	38
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 2,072	$ 31,000
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 23	$ 210
Held-to-maturity securities, 12 Months or More: Number of Securities | security	74	115
Held-to-maturity securities, 12 Months or More: Fair Value	$ 64,166	$ 80,743
Held-to-maturity securities, 12 Months or More: Unrealized Losses	$ 814	$ 2,095
Held-to-maturity securities, Total: Number of Securities | security	76	153
Held-to-maturity securities, Total: Fair Value	$ 66,238	$ 111,743
Held-to-maturity securities, Total: Unrealized Losses	$ 837	$ 2,305
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Number of Securities | security	5	54
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Fair Value	$ 6,388	$ 51,487
Available-for-sale securities and Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 37	$ 400
Available-for-sale securities and Held-to-maturity securities,, 12 Months or More: Number of Securities | security	160	206
Available-for-sale securities and Held-to-maturity securities, 12 Months or More: Fair Value	$ 149,868	$ 165,742
Available-for-sale securities and Held-to-maturity securities, 12 Months or More: Unrealized Losses	$ 2,672	$ 6,030
Available-for-sale securities and Held-to-maturity securities, Total: Number of Securities | security	165	260
Available-for-sale securities and Held-to-maturity securities, Total: Fair Value	$ 156,256	$ 217,229
Available-for-sale securities and Held-to-maturity securities, Total: Unrealized Losses	$ 2,709	$ 6,430
U.S. Treasury and U.S. government agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security	0	0
Available-for-sale securities, 12 Months or More: Number of Securities | security	21	21
Available-for-sale securities, 12 Months or More: Fair Value	$ 39,180	$ 38,386
Available-for-sale securities, 12 Months or More: Unrealized Losses	$ 906	$ 1,708
Available-for-sale securities, Total: Number of Securities | security	21	21
Available-for-sale securities, Total: Fair Value	$ 39,180	$ 38,386
Available-for-sale securities, Total: Unrealized Losses	$ 906	$ 1,708
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	0	1
Held-to-maturity securities, Less than 12 Months: Fair Value		$ 1,985
Held-to-maturity securities, Less than 12 Months: Unrealized Losses		$ 10
Held-to-maturity securities, 12 Months or More: Number of Securities | security	3	3
Held-to-maturity securities, 12 Months or More: Fair Value	$ 8,903	$ 8,852
Held-to-maturity securities, 12 Months or More: Unrealized Losses	$ 83	$ 133
Held-to-maturity securities, Total: Number of Securities | security	3	4
Held-to-maturity securities, Total: Fair Value	$ 8,903	$ 10,837
Held-to-maturity securities, Total: Unrealized Losses	$ 83	$ 143
Mortgage-backed U.S. Government Agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security	1	11
Available-for-sale securities, Less than 12 Months: Fair Value	$ 1,846	$ 16,740
Available-for-sale securities, Less than 12 Months: Unrealized Losses	$ 2	$ 163
Available-for-sale securities, 12 Months or More: Number of Securities | security	21	19
Available-for-sale securities, 12 Months or More: Fair Value	$ 24,885	$ 22,093
Available-for-sale securities, 12 Months or More: Unrealized Losses	$ 498	$ 853
Available-for-sale securities, Total: Number of Securities | security	22	30
Available-for-sale securities, Total: Fair Value	$ 26,731	$ 38,833
Available-for-sale securities, Total: Unrealized Losses	$ 500	$ 1,016
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	0	10
Held-to-maturity securities, Less than 12 Months: Fair Value		$ 16,165
Held-to-maturity securities, Less than 12 Months: Unrealized Losses		$ 79
Held-to-maturity securities, 12 Months or More: Number of Securities | security	35	35
Held-to-maturity securities, 12 Months or More: Fair Value	$ 41,088	$ 42,431
Held-to-maturity securities, 12 Months or More: Unrealized Losses	$ 663	$ 1,231
Held-to-maturity securities, Total: Number of Securities | security	35	45
Held-to-maturity securities, Total: Fair Value	$ 41,088	$ 58,596
Held-to-maturity securities, Total: Unrealized Losses	$ 663	$ 1,310
State and political subdivision obligations [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security	0	3
Available-for-sale securities, Less than 12 Months: Fair Value		$ 1,751
Available-for-sale securities, Less than 12 Months: Unrealized Losses		$ 23
Available-for-sale securities, 12 Months or More: Number of Securities | security	44	51
Available-for-sale securities, 12 Months or More: Fair Value	$ 21,637	$ 24,520
Available-for-sale securities, 12 Months or More: Unrealized Losses	$ 454	$ 1,374
Available-for-sale securities, Total: Number of Securities | security	44	54
Available-for-sale securities, Total: Fair Value	$ 21,637	$ 26,271
Available-for-sale securities, Total: Unrealized Losses	$ 454	$ 1,397
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	1	26
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 555	$ 11,321
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 5	$ 111
Held-to-maturity securities, 12 Months or More: Number of Securities | security	36	77
Held-to-maturity securities, 12 Months or More: Fair Value	$ 14,175	$ 29,460
Held-to-maturity securities, 12 Months or More: Unrealized Losses	$ 68	$ 731
Held-to-maturity securities, Total: Number of Securities | security	37	103
Held-to-maturity securities, Total: Fair Value	$ 14,730	$ 40,781
Held-to-maturity securities, Total: Unrealized Losses	$ 73	$ 842
Corporate debt securities [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Less than 12 Months: Number of Securities | security	2	2
Available-for-sale securities, Less than 12 Months: Fair Value	$ 2,470	$ 1,996
Available-for-sale securities, Less than 12 Months: Unrealized Losses	$ 12	$ 4
Available-for-sale securities, 12 Months or More: Number of Securities | security	0	0
Available-for-sale securities, Total: Number of Securities | security	2	2
Available-for-sale securities, Total: Fair Value	$ 2,470	$ 1,996
Available-for-sale securities, Total: Unrealized Losses	$ 12	$ 4
Held-to-maturity securities, Less than 12 Months: Number of Securities | security	1	1
Held-to-maturity securities, Less than 12 Months: Fair Value	$ 1,517	$ 1,529
Held-to-maturity securities, Less than 12 Months: Unrealized Losses	$ 18	$ 10
Held-to-maturity securities, 12 Months or More: Number of Securities | security	0	0
Held-to-maturity securities, Total: Number of Securities | security	1	1
Held-to-maturity securities, Total: Fair Value	$ 1,517	$ 1,529
Held-to-maturity securities, Total: Unrealized Losses	$ 18	$ 10