Securities (Details) $ in Thousands	Sep. 30, 2016 USD ($) security	Dec. 31, 2015 USD ($) security
Securities available for sale
Securities available for sale	$ 250,615	$ 264,235
Securities available for sale, Percent	100.00%	100.00%
Available-for-sale Securities Reconciliation [Abstract]
Amortized Cost	$ 247,267	$ 261,991
Gross Unrealized Gains	3,445	2,548
Gross Unrealized (Losses)	(97)	(304)
Estimated Fair Value	250,615	264,235
Amortized Cost
Due in one year or less	39,421
Due after one year through five years	140,476
Due after five years through ten years	66,055
Due over ten years	1,315
Amortized Cost	247,267
Fair Value
Due in one year or less	39,562
Due after one year through five years	142,177
Due after five years through ten years	67,561
Due over ten years	1,315
Fair Value	250,615	$ 264,235
Carrying value of investment securities pledged to collateralize short-term borrowings	$ 62,330
Less than 12 months
Number of securities \| security	60	74
Fair Value	$ 20,959	$ 57,842
Unrealized Loss	$ (83)	$ (230)
Percentage	0.40%	0.40%
12 months or more
Number of securities \| security	10	27
Fair Value	$ 1,363	$ 5,633
Unrealized Loss	$ (14)	$ (74)
Percentage	1.03%	1.31%
Total
Number of securities \| security	70	101
Fair Value	$ 22,322	$ 63,475
Unrealized Loss	$ (97)	$ (304)
Percentage	0.43%	0.48%
U.S. Treasury [Member]
Securities available for sale
Securities available for sale	$ 25,243	$ 24,978
Securities available for sale, Percent	10.07%	9.45%
Available-for-sale Securities Reconciliation [Abstract]
Amortized Cost	$ 24,929	$ 24,893
Gross Unrealized Gains	314	92
Gross Unrealized (Losses)	0	(7)
Estimated Fair Value	25,243	24,978
Fair Value
Fair Value	$ 25,243	$ 24,978
Less than 12 months
Number of securities \| security	0	3
Fair Value	$ 0	$ 7,455
Unrealized Loss	$ 0	$ (7)
Percentage	0.00%	0.09%
12 months or more
Number of securities \| security	0	0
Fair Value	$ 0	$ 0
Unrealized Loss	$ 0	$ 0
Percentage	0.00%	0.00%
Total
Number of securities \| security	0	3
Fair Value	$ 0	$ 7,455
Unrealized Loss	$ 0	$ (7)
Percentage	0.00%	0.09%
Other securities (FHLB, FHLMC and FNMA) [Member]
Securities available for sale
Securities available for sale	$ 63,731	$ 65,328
Securities available for sale, Percent	25.43%	24.72%
Available-for-sale Securities Reconciliation [Abstract]
Amortized Cost	$ 63,357	$ 65,400
Gross Unrealized Gains	396	81
Gross Unrealized (Losses)	(22)	(153)
Estimated Fair Value	63,731	65,328
Fair Value
Fair Value	$ 63,731	$ 65,328
Less than 12 months
Number of securities \| security	3	15
Fair Value	$ 6,910	$ 36,830
Unrealized Loss	$ (22)	$ (153)
Percentage	0.32%	0.42%
12 months or more
Number of securities \| security	0	0
Fair Value	$ 0	$ 0
Unrealized Loss	$ 0	$ 0
Percentage	0.00%	0.00%
Total
Number of securities \| security	3	15
Fair Value	$ 6,910	$ 36,830
Unrealized Loss	$ (22)	$ (153)
Percentage	0.32%	0.42%
State and political subdivisions [Member]
Securities available for sale
Securities available for sale	$ 161,641	$ 173,929
Securities available for sale, Percent	64.50%	65.83%
Available-for-sale Securities Reconciliation [Abstract]
Amortized Cost	$ 158,981	$ 171,698
Gross Unrealized Gains	2,735	2,375
Gross Unrealized (Losses)	(75)	(144)
Estimated Fair Value	161,641	173,929
Fair Value
Fair Value	$ 161,641	$ 173,929
Less than 12 months
Number of securities \| security	57	56
Fair Value	$ 14,049	$ 13,557
Unrealized Loss	$ (61)	$ (70)
Percentage	0.43%	0.52%
12 months or more
Number of securities \| security	10	27
Fair Value	$ 1,363	$ 5,633
Unrealized Loss	$ (14)	$ (74)
Percentage	1.03%	1.31%
Total
Number of securities \| security	67	83
Fair Value	$ 15,412	$ 19,190
Unrealized Loss	$ (75)	$ (144)
Percentage	0.49%	0.75%

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Number of investment positions in available-for-sale investments in a continuous unrealized loss position for less than one year or normal operating cycle, if longer, for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

+ References

No definition available.

+ Details

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- Definition

Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

+ References

+ Details

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- Definition

Number of investment positions in available-for-sale investments that have been in a continuous unrealized loss position for greater than or equal to a year for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

+ References

No definition available.

+ Details

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