Securities - Temporarily Impaired Gross Unrealized Losses And Fair Value Of Available-For-Sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	$ 50,667	$ 54,222
Less Than 12 Months, Gross Unrealized Losses	(1,126)	(1,555)
12 Months or More, Fair Value	2,607	2,765
12 Months or More, Gross Unrealized Losses	(42)	(45)
Total, Fair Value	53,274	56,987
Total, Gross Unrealized Losses	(1,168)	(1,600)
U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	11,199	4,952
Less Than 12 Months, Gross Unrealized Losses	(53)	(15)
12 Months or More, Fair Value	2,067	2,126
12 Months or More, Gross Unrealized Losses	(41)	(42)
Total, Fair Value	13,266	7,078
Total, Gross Unrealized Losses	(94)	(57)
State And Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	14,930	23,989
Less Than 12 Months, Gross Unrealized Losses	(524)	(770)
12 Months or More, Fair Value	0	0
12 Months or More, Gross Unrealized Losses	0	0
Total, Fair Value	14,930	23,989
Total, Gross Unrealized Losses	(524)	(770)
U.S. Government-Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	24,538	23,299
Less Than 12 Months, Gross Unrealized Losses	(549)	(752)
12 Months or More, Fair Value	540	639
12 Months or More, Gross Unrealized Losses	(1)	(3)
Total, Fair Value	25,078	23,938
Total, Gross Unrealized Losses	(550)	(755)
Corporate Debt [Member]
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	0	1,982
Less Than 12 Months, Gross Unrealized Losses	0	(18)
12 Months or More, Fair Value	0	0
12 Months or More, Gross Unrealized Losses	0	0
Total, Fair Value	0	1,982
Total, Gross Unrealized Losses	$ 0	$ (18)