Securities Available for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 392,576	$ 374,343
Gross Unrealized Gains	4,253	2,263
Gross Unrealized Losses	(3,498)	(6,611)
Fair Value	393,331	369,995
Corporate bonds
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	1,238	1,343
Gross Unrealized Gains	4	4
Gross Unrealized Losses	(8)	(8)
Fair Value	1,234	1,339
Collateralized mortgage obligations
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	17,898	21,397
Gross Unrealized Gains	0	1
Gross Unrealized Losses	(777)	(705)
Fair Value	17,121	20,693
Small Business Administration
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	14,608	17,236
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(396)	(530)
Fair Value	14,212	16,706
U.S. Treasury and U.S. government sponsored entities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	8,986	5,970
Gross Unrealized Gains	0	5
Gross Unrealized Losses	(69)	(54)
Fair Value	8,917	5,921
State and political subdivisions
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	188,032	157,014
Gross Unrealized Gains	3,614	1,049
Gross Unrealized Losses	(643)	(2,760)
Fair Value	191,003	155,303
Mortgage-backed securities - residential
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	161,635	171,215
Gross Unrealized Gains	419	1,019
Gross Unrealized Losses	(1,604)	(2,552)
Fair Value	160,450	169,682
Equity securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	179	168
Gross Unrealized Gains	216	185
Gross Unrealized Losses	(1)	(2)
Fair Value	$ 394	$ 351

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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